1. Home
  2. Vulnerabilities
  3. CVE-2026-64849
Known Exploited Vulnerability
9.3
CRITICAL CVSS 3.1
CVE-2026-64849
MLflow Server-Side Request Forgery Vulnerability - [Actively Exploited]
Overview
Description

MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. Prior to 3.15.0, the unauthenticated POST /api/2.0/mlflow/webhooks/{id}/test endpoint calls _validate_webhook_url() in mlflow/utils/validation.py only for the original URL while mlflow/webhooks/delivery.py follows redirects and re-resolves the hostname without pinning the validated address, allowing attackers to reach internal or cloud metadata services and receive response_status and response_body. This issue is fixed in version 3.15.0.

Details
INFO

Published Date :

Aug. 17, 2026, 10:17 p.m.

Last Modified :

Aug. 20, 2026, 7:16 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 :

MLflow contains a server-side request forgery vulnerability that can allow attackers to reach internal or cloud metadata services and receive response_status and response_body.

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 :

https://github.com/mlflow/mlflow/pull/24258 ; https://github.com/mlflow/mlflow/issues/24179 ; 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-2026-64849

Impact
Affected Products

The following products are affected by CVE-2026-64849 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 Lfprojects mlflow
: Total Affected Vendor : 1 | Products : 1
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 3.1 CRITICAL MITRE-CVE
Solution
Update MLflow to version 3.15.0 or later to fix SSRF vulnerability.
  • Update MLflow to version 3.15.0 or later.
  • Ensure webhook URLs are validated after redirects.
  • Restrict access to internal services.
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-2026-64849.

URL Resource
https://github.com/mlflow/mlflow/commit/ba949522477cbd5915aa55d29b0cfad7d5ddf939 Patch
https://github.com/mlflow/mlflow/issues/24179 Exploit Issue Tracking Mitigation
https://github.com/mlflow/mlflow/pull/24258 Issue Tracking Patch
https://github.com/mlflow/mlflow/releases/tag/v3.15.0 Release Notes
https://github.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969j Exploit Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-64849 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-2026-64849 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-2026-64849 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-2026-64849 vulnerability anywhere in the article.

  • europa.eu
Cyber Brief 26-09 - August 2026

Cyber Brief (August 2026)September 3, 2026 - Version 1TLP:CLEARExecutive summaryWe analysed 385 open source reports for this Cyber Brief1.Relating to cyber policy and law enforcement, two alleged memb ... Read more

Published Date: Sep 03, 2026 (4 days, 12 hours ago)
  • security.nl
Kritiek beveiligingslek in AI-platform MLflow misbruikt bij aanvallen, meldt VS

Een kritieke kwetsbaarheid in AI-platform MLflow wordt misbruikt bij aanvallen, zo meldt het Amerikaanse cyberagentschap CISA. MLflow is een open source 'AI engineering platform' voor het ontwikkelen, ... Read more

Published Date: Aug 20, 2026 (2 weeks, 4 days ago)
  • The Hacker News
Attackers Exploit MLflow SSRF Flaw to Steal Cloud Credentials and Secrets

Two critical vulnerabilities impacting MLflow, an open-source artificial intelligence (AI) platform, and FUXA, an open-source, web-based SCADA / HMI software built for operational technology (OT) and ... Read more

Published Date: Aug 18, 2026 (2 weeks, 6 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-2026-64849 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.

  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Aug. 20, 2026

    Action Type Old Value New Value
    Changed SSVC {'id': 'CVE-2026-64849', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-18T00:00:00+00:00'} {'id': 'CVE-2026-64849', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-20T03:55:29.820245Z'}
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Aug. 20, 2026

    Action Type Old Value New Value
    Changed SSVC {'id': 'CVE-2026-64849', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-19T17:44:03.944227Z'} {'id': 'CVE-2026-64849', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-18T00:00:00+00:00'}
  • Initial Analysis by [email protected]

    Aug. 19, 2026

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:a:lfprojects:mlflow:*:*:*:*:*:*:*:* versions up to (excluding) 3.15.0
    Added Reference Type GitHub, Inc.: https://github.com/mlflow/mlflow/commit/ba949522477cbd5915aa55d29b0cfad7d5ddf939 Types: Patch
    Added Reference Type GitHub, Inc.: https://github.com/mlflow/mlflow/issues/24179 Types: Exploit, Issue Tracking, Mitigation
    Added Reference Type GitHub, Inc.: https://github.com/mlflow/mlflow/pull/24258 Types: Issue Tracking, Patch
    Added Reference Type GitHub, Inc.: https://github.com/mlflow/mlflow/releases/tag/v3.15.0 Types: Release Notes
    Added Reference Type GitHub, Inc.: https://github.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969j Types: Exploit, Vendor Advisory
    Added Reference Type CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-64849 Types: US Government Resource
  • CVE CISA KEV Update by 9119a7d8-5eab-497f-8521-727c672e3725

    Aug. 19, 2026

    Action Type Old Value New Value
    Added Date Added 2026-08-19
    Added Due Date 2026-08-19
    Added Required Action 2026-08-19
    Added Vulnerability Name 2026-08-19
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Aug. 19, 2026

    Action Type Old Value New Value
    Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-64849
    Changed SSVC {'id': 'CVE-2026-64849', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-18T00:00:00+00:00'} {'id': 'CVE-2026-64849', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-19T17:44:03.944227Z'}
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Aug. 19, 2026

    Action Type Old Value New Value
    Changed SSVC {'id': 'CVE-2026-64849', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-18T17:44:42.633789Z'} {'id': 'CVE-2026-64849', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-18T00:00:00+00:00'}
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Aug. 18, 2026

    Action Type Old Value New Value
    Added SSVC {'id': 'CVE-2026-64849', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-18T17:44:42.633789Z'}
  • New CVE Received by [email protected]

    Aug. 17, 2026

    Action Type Old Value New Value
    Added Affected [{'vendor': 'mlflow', 'product': 'mlflow', 'versions': [{'status': 'affected', 'version': '< 3.15.0'}]}]
    Added Description MLflow is an open source AI engineering platform for agents, large language models, and machine learning models. Prior to 3.15.0, the unauthenticated POST /api/2.0/mlflow/webhooks/{id}/test endpoint calls _validate_webhook_url() in mlflow/utils/validation.py only for the original URL while mlflow/webhooks/delivery.py follows redirects and re-resolves the hostname without pinning the validated address, allowing attackers to reach internal or cloud metadata services and receive response_status and response_body. This issue is fixed in version 3.15.0.
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
    Added CWE CWE-918
    Added Reference https://github.com/mlflow/mlflow/commit/ba949522477cbd5915aa55d29b0cfad7d5ddf939
    Added Reference https://github.com/mlflow/mlflow/issues/24179
    Added Reference https://github.com/mlflow/mlflow/pull/24258
    Added Reference https://github.com/mlflow/mlflow/releases/tag/v3.15.0
    Added Reference https://github.com/mlflow/mlflow/security/advisories/GHSA-7gwp-5pfp-969j
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: 9.3
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact