1. Home
  2. Vulnerabilities
  3. CVE-2026-111497
Known Exploited Vulnerability
9.8
CRITICAL CVSS 3.1
CVE-2026-111497
Google Brotli Unchecked Return Value Vulnerability - [Actively Exploited]
Overview
Description

A buffer overflow vulnerability in the Brotli decoder (c/dec/decode.c) in Google Brotli versions 1.0.3 through 1.2.0 on all platforms allows a remote unauthenticated attacker to corrupt adjacent decoder state memory, disclose sensitive memory contents, cause a denial of service, or potentially execute arbitrary code using a crafted Brotli-compressed stream. Users need to update any Brotli libraries or binaries between 1.0.3 through 1.2.0 to the latest available version: 1.0.10 or 1.1.1 or 1.2.1.

Details
INFO

Published Date :

Oct. 22, 2026, 2:17 p.m.

Last Modified :

Nov. 10, 2026, 8:25 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
CISA Notification
CISA KEV (Known Exploited Vulnerabilities)

For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.

Description :

Google Brotli contains an unchecked return value vulnerability that allows a remote unauthenticated attacker to corrupt adjacent decoder state memory, disclose sensitive memory contents, cause a denial of service, or potentially execute arbitrary code using a crafted Brotli-compressed stream.

Required Action :

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Known Ransomware Campaign Use:

Unknown

Notes :

This vulnerability affects an open-source component, third-party library, protocol, or proprietary implementation that could be used by different products. For more information, please see: https://github.com/google/brotli/releases/tag/v1.2.1 ; ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-111497

Impact
Affected Products

The following products are affected by CVE-2026-111497 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Siemens xpedition_designer
2 Siemens teamcenter
3 Siemens simatic_wincc
4 Siemens tia_administrator
5 Siemens simatic_wincc_runtime
6 Siemens opcenter_quality
7 Siemens opcenter_execution_core
8 Siemens opcenter_execution_discrete
9 Siemens opcenter_execution_foundation
10 Siemens opcenter_execution_process
11 Siemens opcenter_intelligence
12 Siemens opcenter_rd\&l
13 Siemens xpedition_enterprise
14 Siemens ruggedcom_ape1808_firmware
15 Siemens ruggedcom_ape1808
16 Siemens user_management_component
17 Siemens simatic_wincc_unified_pc_runtime
18 Siemens common_configurator
19 Siemens data_flow_monitoring
20 Siemens edge_opc_ua_server_configurator
21 Siemens flow_creator_configurator
22 Siemens industrial_edge_cloud_connector_configurator
23 Siemens industrial_edge_databus_configurator
24 Siemens industrial_edge_hub
25 Siemens industrial_edge_management_cloud
26 Siemens dataxess_configurator
27 Siemens comos_walkinside
28 Siemens simatic_braumat
29 Siemens simatic_profiling_tool
30 Siemens simatic_sistar
31 Siemens simatic_wincc_companion
32 Siemens simatic_wincc_unified_for_industrial_edge
33 Siemens simatic_wincc_unified_siqence
34 Siemens tia_project-server_web_administration_tool
35 Siemens hyperlynx
36 Siemens innexis_architecture_native_acceleration
37 Siemens insights_hub
38 Siemens opcenter_connect_electronics
39 Siemens opcenter_connect_manufacturing_operations_management
40 Siemens opcenter_execution_pharma
41 Siemens opcenter_x
42 Siemens pads_professional
43 Siemens pave360_automotive
44 Siemens process_preparation_x
45 Siemens simcenter_executable_digital_twin
46 Siemens simcenter_studio
1 Microsoft visual_studio_2017
2 Microsoft visual_studio_2019
3 Microsoft .net
4 Microsoft powershell
5 Microsoft visual_studio_2022
6 Microsoft visual_studio_2026
1 Elastic kibana
2 Elastic elastic_agent
3 Elastic maps_server
1 Ibm qradar_security_information_and_event_manager
2 Ibm app_connect_enterprise
1 Esri arcgis_pro
2 Esri arcgis_enterprise
1 Google brotli
2 Google woff2
1 Debian debian_linux
1 Enalean tuleap
1 Envoyproxy envoy
1 Istio istio
1 Nodejs node.js
1 Paloaltonetworks pan-os
1 Tianocore edk2
1 Apache arrow
1 Hp thinpro
1 Vmware cloud_foundation
1 Stormshield stormshield_management_center
1 Clickhouse clickhouse
1 7-zip p7zip
1 Cloudflare workerd
1 Duckdb duckdb
1 Mitel mivoice_business_solution_virtual_instance
1 Igel igel_os
1 M2team nanazip
1 Hcltech bigfix_webui_common
1 F5 waf
1 Arista velocloud_orchestrator
1 Python-hyper brotlicffi
1 Anthropic bun
1 Mcmilk 7-zip-zstd
1 Andybalholm brotli
: Total Affected Vendor : 31 | Products : 86
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 134c704f-9b21-4f2e-91b3-4a467353bcc0
CVSS 3.1 CRITICAL [email protected]
CVSS 4.0 CRITICAL 14ed7db2-1595-443d-9d34-6215bf890778
CVSS 4.0 CRITICAL [email protected]
Solution
Update Brotli libraries to resolve memory corruption and potential code execution vulnerabilities.
  • Update Brotli libraries to version 1.0.10, 1.1.1, or 1.2.1.
  • Replace affected Brotli binaries with updated versions.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-111497.

URL Resource
https://github.com/andybalholm/brotli/releases/tag/v1.2.7 Release Notes
https://nodejs.org/en/blog/vulnerability/october-2026-security-releases#nodejs-brotli-decoder-out-of-bounds-write-permits-remote-code-execution-cve-2026-111497---high Third Party Advisory
http://www.openwall.com/lists/oss-security/2026/10/23/25 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2026/10/24/6 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2026/10/26/12 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2026/10/26/13 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2026/10/26/16 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2026/11/03/2 Mailing List Third Party Advisory
https://broccoli2shell.com Third Party Advisory
https://github.com/advisories/GHSA-9v8h-qqgm-4m35 Third Party Advisory
https://github.com/dotnet/announcements/issues/494 Issue Tracking Mitigation Third Party Advisory
https://github.com/google/brotli/releases/tag/v1.0.10 Release Notes
https://github.com/google/brotli/releases/tag/v1.1.1 Release Notes
https://github.com/google/brotli/releases/tag/v1.2.1 Release Notes
https://lists.debian.org/debian-lts-announce/2026/10/msg00049.html Mailing List Third Party Advisory
https://patchtheplanet.org/brotli Third Party Advisory
https://www.aikido.dev/blog/node2shell-nodejs-brotli-rce-cve-2026-111497 Third Party Advisory
https://cert-portal.siemens.com/productcert/html/ssa-045512.html Third Party Advisory
https://cert-portal.siemens.com/productcert/html/ssa-242944.html Third Party Advisory
https://cert-portal.siemens.com/productcert/html/ssa-443410.html Third Party Advisory
https://cert-portal.siemens.com/productcert/html/ssa-678870.html Third Party Advisory
https://cert-portal.siemens.com/productcert/html/ssa-898633.html Third Party Advisory
https://ellio.tech/en/blog/node2shell-cve-2026-111497-rce-on-stock-nodejs-builds/ Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-111497 US Government Resource
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-111497 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-111497 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-111497 vulnerability anywhere in the article.

  • The Hacker News
Apple Patches iMessage Group Chat Privacy Flaws and Bluetooth Pairing Vulnerabilities

An iMessage flaw could let a remote attacker join a group chat and receive its messages, Apple said yesterday, and it released updates to fix it. The updates also fix a separate iMessage flaw that cou ... Read more

Published Date: Nov 10, 2026 (1 day, 10 hours ago)
  • europa.eu
Cyber Brief 26-11 - October 2026

Cyber Brief (October 2026)November 6, 2026 - Version 1TLP:CLEARExecutive summaryWe analysed 415 open source reports for this Cyber Brief1.Relating to cyber policy and law enforcement, Europol reported ... Read more

Published Date: Nov 06, 2026 (5 days, 5 hours ago)
  • The Hacker News
OpenAI Launches GPT-6 Cyber After AI Helps Find 81 Firefox Flaws, 948 Linux Exploits

OpenAI on Thursday unveiled GPT‑6 Cyber, which it described as a major step forward in security research that brings together stronger cybersecurity capabilities with a step-change improvement in mode ... Read more

Published Date: Nov 06, 2026 (5 days, 5 hours ago)
  • SentinelOne
The Good, the Bad and the Ugly in Cybersecurity - Week 44 (2026)

The Good | Global Response Continues for PHP2SHELL Exploit Attempts & Defenders Dismantle Global Cybercrime RingsThis past week, cyber defenders responded to a cluster of vulnerability disclosures and ... Read more

Published Date: Oct 30, 2026 (1 week, 5 days ago)
  • SentinelOne
Node2Shell: Remote Code Execution via a Brotli Decoder Flaw

Executive SummaryOn October 21, 2026, the Node.js project released security updates that fix CVE-2026-111497, an out-of-bounds write in the Brotli decoder bundled with the runtime. Vendors have labele ... Read more

Published Date: Oct 30, 2026 (1 week, 5 days ago)
  • The Hacker News
Adobe Commerce PolyShell Attacks Breach Hundreds of Stores as Brotli Exploit Traffic Emerges

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Tuesday added two vulnerabilities impacting Adobe Commerce and Magento, and Google's Brotli decoder library to its Known Exploited V ... Read more

Published Date: Oct 28, 2026 (2 weeks ago)
  • The Hacker News
PHP Issues Second Windows Security Update in Five Days to Fix Brotli Code Execution Flaw

PHP has rebuilt its official Windows packages for PHP 8.2 through 8.5 to fix CVE-2026-111497, a flaw in the Brotli compression library that the packages include. The flaw can let an attacker corrupt m ... Read more

Published Date: Oct 26, 2026 (2 weeks, 2 days ago)
  • TheCyberThrone
Microsoft Releases Out-of-Band .NET Security Updates: Four Vulnerabilities Addressed

Microsoft released out-of-band security updates for .NET on October 25, 2026, outside its regular monthly servicing schedule.The release addresses a buffer overflow vulnerability in Brotli decompressi ... Read more

Published Date: Oct 26, 2026 (2 weeks, 2 days ago)
  • The Hacker News
OpenAI AI Agents Demonstrate VM Escapes and Secret Cross-Sandbox Communication

OpenAI has announced plans to conduct frontier model training with no live internet access, as it resumes reinforcement learning (RL) training and internal inference of its most advanced AI models. "B ... Read more

Published Date: Oct 25, 2026 (2 weeks, 3 days ago)
  • The Hacker News
Brotli Decoder Flaw Behind Node.js RCE Also Affects Bun, Python and Other Widely Used Software

A memory-corruption flaw in Google's Brotli decoder sits in many programs that unpack Brotli-compressed data, among them Bun, the Python Brotli and brotlicffi packages, and Envoy proxies set up to dec ... Read more

Published Date: Oct 24, 2026 (2 weeks, 4 days ago)
  • The Hacker News
Researchers Demonstrate Node2Shell RCE Exploit on Node.js Build Using Crafted Brotli Data

Malicious Brotli data can make an application on an official build of Node.js run attacker-supplied code, security researchers at Imperva have demonstrated. Their "Node2Shell" proof of concept ran cod ... Read more

Published Date: Oct 23, 2026 (2 weeks, 5 days ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-111497 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Modified Analysis by [email protected]

    Nov. 10, 2026

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:a:siemens:simatic_wincc_runtime:-:*:*:*:professional:*:*:* *cpe:2.3:a:siemens:comos_walkinside:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:simatic_braumat:8.2:update1:*:*:*:*:*:* *cpe:2.3:a:siemens:simatic_braumat:8.2:update2:*:*:*:*:*:* *cpe:2.3:a:siemens:simatic_braumat:8.2:update3:*:*:*:*:*:* *cpe:2.3:a:siemens:simatic_braumat:8.2:update4:*:*:*:*:*:* *cpe:2.3:a:siemens:simatic_braumat:8.2:update5:*:*:*:*:*:* *cpe:2.3:a:siemens:simatic_profiling_tool:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:tia_project-server_web_administration_tool:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:simatic_sistar:8.2:update1:*:*:*:*:*:* *cpe:2.3:a:siemens:simatic_sistar:8.2:update2:*:*:*:*:*:* *cpe:2.3:a:siemens:simatic_sistar:8.2:update3:*:*:*:*:*:* *cpe:2.3:a:siemens:simatic_sistar:8.2:update4:*:*:*:*:*:* *cpe:2.3:a:siemens:simatic_sistar:8.2:update5:*:*:*:*:*:* *cpe:2.3:a:siemens:simatic_wincc:*:*:*:*:*:*:*:* versions from (including) 7.0 up to (including) 8.2 *cpe:2.3:a:siemens:simatic_wincc_companion:-:*:*:*:*:-:*:* *cpe:2.3:a:siemens:simatic_wincc_unified_for_industrial_edge:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:simatic_wincc_unified_pc_runtime:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:simatic_wincc_unified_siqence:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:tia_administrator:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:user_management_component:-:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:siemens:xpedition_enterprise:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:opcenter_quality:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:hyperlynx:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:innexis_architecture_native_acceleration:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:insights_hub:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:opcenter_connect_electronics:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:opcenter_connect_manufacturing_operations_management:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:opcenter_execution_core:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:opcenter_execution_discrete:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:opcenter_execution_foundation:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:opcenter_execution_pharma:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:opcenter_execution_process:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:opcenter_intelligence:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:opcenter_rd&l:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:opcenter_x:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:pads_professional:-:*:*:*:essentials:*:*:* *cpe:2.3:a:siemens:pads_professional:-:*:*:*:student:*:*:* *cpe:2.3:a:siemens:pave360_automotive:2026:*:*:*:*:*:*:* *cpe:2.3:a:siemens:process_preparation_x:-:*:*:*:-:*:*:* *cpe:2.3:a:siemens:simcenter_executable_digital_twin:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:simcenter_studio:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:teamcenter:2412.0:*:*:*:*:*:*:* *cpe:2.3:a:siemens:teamcenter:2506.0:*:*:*:*:*:*:* *cpe:2.3:a:siemens:teamcenter:2512.0:*:*:*:*:*:*:* *cpe:2.3:a:siemens:teamcenter:2606.0:*:*:*:*:*:*:* *cpe:2.3:a:siemens:xpedition_designer:-:*:*:*:*:*:*:*
    Changed CPE Configuration OR *cpe:2.3:a:siemens:industrial_edge_cloud_connector_configurator:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:industrial_edge_hub:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:common_configurator:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:edge_opc_ua_server_configurator:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:flow_creator_configurator:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:industrial_edge_databus_configurator:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:industrial_edge_management_cloud:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:data_flow_monitoring:-:*:*:*:*:*:*:* OR *cpe:2.3:a:siemens:industrial_edge_hub:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:common_configurator:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:industrial_edge_management_cloud:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:edge_opc_ua_server_configurator:*:*:*:*:*:*:*:* versions up to (excluding) 2.3.10 *cpe:2.3:a:siemens:flow_creator_configurator:*:*:*:*:*:*:*:* versions up to (excluding) 1.15.1 *cpe:2.3:a:siemens:industrial_edge_cloud_connector_configurator:*:*:*:*:*:*:*:* versions up to (excluding) 1.24.3 *cpe:2.3:a:siemens:industrial_edge_databus_configurator:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.1 *cpe:2.3:a:siemens:data_flow_monitoring:*:*:*:*:*:*:*:* versions up to (excluding) 3.0.18 *cpe:2.3:a:siemens:dataxess_configurator:*:*:*:*:*:*:*:* versions up to (excluding) 1.5.7
    Added Reference Type siemens-SADP: https://cert-portal.siemens.com/productcert/html/ssa-242944.html Types: Third Party Advisory
    Added Reference Type siemens-SADP: https://cert-portal.siemens.com/productcert/html/ssa-678870.html Types: Third Party Advisory
  • CVE Modified by 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

    Nov. 10, 2026

    Action Type Old Value New Value
    Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/111xxx/CVE-2026-111497.json">CVE-2026-111497</a>
    Added Reference https://cert-portal.siemens.com/productcert/html/ssa-242944.html
    Added Reference https://cert-portal.siemens.com/productcert/html/ssa-678870.html
  • CVE Modified by 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

    Nov. 06, 2026

    Action Type Old Value New Value
    Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/111xxx/CVE-2026-111497.json">CVE-2026-111497</a>
  • CVE Modified by 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

    Nov. 04, 2026

    Action Type Old Value New Value
    Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/111xxx/CVE-2026-111497.json">CVE-2026-111497</a>
  • Modified Analysis by [email protected]

    Nov. 04, 2026

    Action Type Old Value New Value
    Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/11/03/2 Types: Mailing List, Third Party Advisory
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 03, 2026

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2026/11/03/2
  • Modified Analysis by [email protected]

    Oct. 30, 2026

    Action Type Old Value New Value
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:ruggedcom_ape1808_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:ruggedcom_ape1808:-:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:siemens:industrial_edge_cloud_connector_configurator:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:industrial_edge_hub:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:common_configurator:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:edge_opc_ua_server_configurator:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:flow_creator_configurator:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:industrial_edge_databus_configurator:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:industrial_edge_management_cloud:-:*:*:*:*:*:*:* *cpe:2.3:a:siemens:data_flow_monitoring:-:*:*:*:*:*:*:*
    Added Reference Type siemens-SADP: https://cert-portal.siemens.com/productcert/html/ssa-045512.html Types: Third Party Advisory
    Added Reference Type siemens-SADP: https://cert-portal.siemens.com/productcert/html/ssa-443410.html Types: Third Party Advisory
    Added Reference Type siemens-SADP: https://cert-portal.siemens.com/productcert/html/ssa-898633.html Types: Third Party Advisory
  • CVE Modified by 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

    Oct. 30, 2026

    Action Type Old Value New Value
    Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/111xxx/CVE-2026-111497.json">CVE-2026-111497</a>
    Added Reference https://cert-portal.siemens.com/productcert/html/ssa-045512.html
  • CVE Modified by 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

    Oct. 30, 2026

    Action Type Old Value New Value
    Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/111xxx/CVE-2026-111497.json">CVE-2026-111497</a>
    Added Reference https://cert-portal.siemens.com/productcert/html/ssa-443410.html
    Added Reference https://cert-portal.siemens.com/productcert/html/ssa-898633.html
  • Initial Analysis by [email protected]

    Oct. 28, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Added CPE Configuration OR *cpe:2.3:a:google:brotli:*:*:*:*:*:-:*:* versions from (including) 1.0.3 up to (excluding) 1.0.10 *cpe:2.3:a:google:brotli:*:*:*:*:*:-:*:* versions from (including) 1.1.0 up to (excluding) 1.1.1 *cpe:2.3:a:google:brotli:*:*:*:*:*:-:*:* versions from (including) 1.2.0 up to (excluding) 1.2.1
    Added CPE Configuration OR *cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* versions up to (excluding) 22.23.4 *cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* versions from (including) 23.0.0 up to (excluding) 24.22.1 *cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:* versions from (including) 25.0.0 up to (excluding) 26.12.1
    Added CPE Configuration OR *cpe:2.3:a:python-hyper:brotlicffi:*:*:*:*:*:python:*:* versions up to (excluding) 1.2.1.0
    Added CPE Configuration OR *cpe:2.3:a:microsoft:.net:11.0.0:rc1:*:*:*:*:*:* *cpe:2.3:a:microsoft:.net:11.0.0:preview1:*:*:*:*:*:* *cpe:2.3:a:microsoft:.net:11.0.0:preview2:*:*:*:*:*:* *cpe:2.3:a:microsoft:.net:11.0.0:preview3:*:*:*:*:*:* *cpe:2.3:a:microsoft:.net:11.0.0:preview4:*:*:*:*:*:* *cpe:2.3:a:microsoft:.net:11.0.0:preview5:*:*:*:*:*:* *cpe:2.3:a:microsoft:.net:11.0.0:preview6:*:*:*:*:*:* *cpe:2.3:a:microsoft:.net:11.0.0:preview7:*:*:*:*:*:* *cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* versions from (including) 10.0.0 up to (excluding) 10.0.14 *cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (excluding) 8.0.33 *cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:* versions from (including) 9.0.0 up to (excluding) 9.0.22 *cpe:2.3:a:microsoft:.net:11.0.0:rc2:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:* versions up to (excluding) 1.29.9 *cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:* versions from (including) 1.30.0 up to (excluding) 1.30.6 *cpe:2.3:a:istio:istio:*:*:*:*:*:*:*:* versions from (including) 1.31.0 up to (excluding) 1.31.2
    Added CPE Configuration OR *cpe:2.3:a:anthropic:bun:*:*:*:*:*:*:*:* versions up to (excluding) 1.4.4
    Added CPE Configuration OR *cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* versions up to (excluding) 1.37.8 *cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* versions from (including) 1.38.0 up to (excluding) 1.38.6 *cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* versions from (including) 1.39.0 up to (excluding) 1.39.3
    Added CPE Configuration OR *cpe:2.3:a:tianocore:edk2:*:*:*:*:*:*:*:* versions up to (including) 202608
    Added CPE Configuration OR *cpe:2.3:a:google:woff2:-:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:duckdb:duckdb:*:*:*:*:*:*:*:* versions up to (including) 2.0.0
    Added CPE Configuration OR *cpe:2.3:a:clickhouse:clickhouse:*:*:*:*:*:*:*:* versions up to (including) 26.10.2.103
    Added CPE Configuration OR *cpe:2.3:a:apache:arrow:*:*:*:*:*:*:*:* versions up to (including) 26.0.0 *cpe:2.3:a:apache:arrow:27.0.0:dev:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:mcmilk:7-zip-zstd:*:*:*:*:*:*:*:* versions up to (including) 26.02-1.5.7-r2
    Added CPE Configuration OR *cpe:2.3:a:7-zip:p7zip:*:*:*:*:*:*:*:* versions up to (including) 16.02
    Added CPE Configuration OR *cpe:2.3:a:andybalholm:brotli:*:*:*:*:*:go:*:* versions up to (excluding) 1.2.7
    Added Reference Type Google Inc.: https://github.com/andybalholm/brotli/releases/tag/v1.2.7 Types: Release Notes
    Added Reference Type CISA-ADP: https://ellio.tech/en/blog/node2shell-cve-2026-111497-rce-on-stock-nodejs-builds/ Types: Third Party Advisory
    Added Reference Type Google Inc.: https://nodejs.org/en/blog/vulnerability/october-2026-security-releases#nodejs-brotli-decoder-out-of-bounds-write-permits-remote-code-execution-cve-2026-111497---high Types: Third Party Advisory
    Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/10/23/25 Types: Mailing List, Third Party Advisory
    Added Reference Type CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-111497 Types: US Government Resource
    Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/10/24/6 Types: Mailing List, Third Party Advisory
    Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/10/26/12 Types: Mailing List, Third Party Advisory
    Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/10/26/13 Types: Mailing List, Third Party Advisory
    Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/10/26/16 Types: Mailing List, Third Party Advisory
    Added Reference Type CVE: https://broccoli2shell.com Types: Third Party Advisory
    Added Reference Type CVE: https://github.com/advisories/GHSA-9v8h-qqgm-4m35 Types: Third Party Advisory
    Added Reference Type CVE: https://github.com/dotnet/announcements/issues/494 Types: Issue Tracking, Mitigation, Third Party Advisory
    Added Reference Type CVE: https://github.com/google/brotli/releases/tag/v1.0.10 Types: Release Notes
    Added Reference Type CVE: https://github.com/google/brotli/releases/tag/v1.1.1 Types: Release Notes
    Added Reference Type CVE: https://github.com/google/brotli/releases/tag/v1.2.1 Types: Release Notes
    Added Reference Type CVE: https://lists.debian.org/debian-lts-announce/2026/10/msg00049.html Types: Mailing List, Third Party Advisory
    Added Reference Type CVE: https://patchtheplanet.org/brotli Types: Third Party Advisory
    Added Reference Type CVE: https://www.aikido.dev/blog/node2shell-nodejs-brotli-rce-cve-2026-111497 Types: Third Party Advisory
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 28, 2026

    Action Type Old Value New Value
    Removed SSVC {'id': 'CVE-2026-111497', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-27T19:53:21.238552Z'}
    Added SSVC {'id': 'CVE-2026-111497', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-23T00:00:00+00:00'}
  • CVE CISA KEV Update by 9119a7d8-5eab-497f-8521-727c672e3725

    Oct. 27, 2026

    Action Type Old Value New Value
    Added Date Added 2026-10-27
    Added Due Date 2026-10-27
    Added Required Action 2026-10-27
    Added Vulnerability Name 2026-10-27
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 27, 2026

    Action Type Old Value New Value
    Added Reference https://ellio.tech/en/blog/node2shell-cve-2026-111497-rce-on-stock-nodejs-builds/
    Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-111497
    Removed SSVC {'id': 'CVE-2026-111497', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-23T00:00:00+00:00'}
    Added SSVC {'id': 'CVE-2026-111497', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-27T19:53:21.238552Z'}
  • CVE Modified by [email protected]

    Oct. 27, 2026

    Action Type Old Value New Value
    Added Reference https://github.com/andybalholm/brotli/releases/tag/v1.2.7
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Oct. 26, 2026

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2026/10/26/16
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Oct. 26, 2026

    Action Type Old Value New Value
    Added Reference https://patchtheplanet.org/brotli
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Oct. 26, 2026

    Action Type Old Value New Value
    Added Reference https://broccoli2shell.com
    Added Reference https://github.com/dotnet/announcements/issues/494
    Added Reference https://github.com/google/brotli/releases/tag/v1.0.10
    Added Reference https://github.com/google/brotli/releases/tag/v1.1.1
    Added Reference https://github.com/google/brotli/releases/tag/v1.2.1
    Added Reference https://www.aikido.dev/blog/node2shell-nodejs-brotli-rce-cve-2026-111497
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Oct. 26, 2026

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2026/10/26/12
    Added Reference http://www.openwall.com/lists/oss-security/2026/10/26/13
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Oct. 24, 2026

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2026/10/24/6
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 24, 2026

    Action Type Old Value New Value
    Removed SSVC {'id': 'CVE-2026-111497', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-23T13:25:59.976575Z'}
    Added SSVC {'id': 'CVE-2026-111497', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-23T00:00:00+00:00'}
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Oct. 23, 2026

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2026/10/23/25
    Added Reference https://lists.debian.org/debian-lts-announce/2026/10/msg00049.html
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Oct. 23, 2026

    Action Type Old Value New Value
    Added Reference https://github.com/advisories/GHSA-9v8h-qqgm-4m35
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 23, 2026

    Action Type Old Value New Value
    Removed Reference https://www.imperva.com/blog/node2shell-from-brotli-data-to-remote-code-execution/
    Removed SSVC {'id': 'CVE-2026-111497', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-23T12:56:59.549410Z'}
    Added SSVC {'id': 'CVE-2026-111497', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-23T13:25:59.976575Z'}
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 23, 2026

    Action Type Old Value New Value
    Added Reference https://www.imperva.com/blog/node2shell-from-brotli-data-to-remote-code-execution/
    Removed SSVC {'id': 'CVE-2026-111497', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-22T14:15:10.861688Z'}
    Added SSVC {'id': 'CVE-2026-111497', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-23T12:56:59.549410Z'}
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Oct. 22, 2026

    Action Type Old Value New Value
    Added SSVC {'id': 'CVE-2026-111497', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-22T14:15:10.861688Z'}
  • New CVE Received by [email protected]

    Oct. 22, 2026

    Action Type Old Value New Value
    Added Description A buffer overflow vulnerability in the Brotli decoder (c/dec/decode.c) in Google Brotli versions 1.0.3 through 1.2.0 on all platforms allows a remote unauthenticated attacker to corrupt adjacent decoder state memory, disclose sensitive memory contents, cause a denial of service, or potentially execute arbitrary code using a crafted Brotli-compressed stream. Users need to update any Brotli libraries or binaries between 1.0.3 through 1.2.0 to the latest available version: 1.0.10 or 1.1.1 or 1.2.1.
    Added CVSS V4.0 AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
    Added CWE CWE-787
    Added CWE CWE-252
    Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/111xxx/CVE-2026-111497.json">CVE-2026-111497</a>
    Added Reference https://nodejs.org/en/blog/vulnerability/october-2026-security-releases#nodejs-brotli-decoder-out-of-bounds-write-permits-remote-code-execution-cve-2026-111497---high
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 9.2
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Base CVSS Score: 9.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact