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9.8
CRITICAL CVSS 3.1
CVE-2026-27944
Nginx UI: Unauthenticated Backup Download with Encryption Key Disclosure
Overview
Description

Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.3, the /api/backup endpoint is accessible without authentication and discloses the encryption keys required to decrypt the backup in the X-Backup-Security response header. This allows an unauthenticated attacker to download a full system backup containing sensitive data (user credentials, session tokens, SSL private keys, Nginx configurations) and decrypt it immediately. This issue has been patched in version 2.3.3.

Details
INFO

Published Date :

March 5, 2026, 7:16 p.m.

Last Modified :

March 10, 2026, 6:11 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Impact
Affected Products

The following products are affected by CVE-2026-27944 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 Nginxui nginx_ui
: 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 3.1 CRITICAL [email protected]
Solution
Update Nginx UI to version 2.3.3 or later to patch the authentication bypass and backup disclosure vulnerability.
  • Update Nginx UI to version 2.3.3 or higher.
  • Apply vendor-provided patches for Nginx UI.
  • Remove unneeded API endpoints.
  • Restrict access to sensitive endpoints.
Public PoC/Exploit Available at Github

CVE-2026-27944 has a 11 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

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-2026-27944.

URL Resource
https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-g9w5-qffc-6762 Exploit Vendor Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-27944 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-2026-27944 weaknesses.

CAPEC-12: Choosing Message Identifier Choosing Message Identifier CAPEC-36: Using Unpublished Interfaces or Functionality Using Unpublished Interfaces or Functionality CAPEC-62: Cross Site Request Forgery Cross Site Request Forgery CAPEC-166: Force the System to Reset Values Force the System to Reset Values CAPEC-216: Communication Channel Manipulation Communication Channel Manipulation CAPEC-31: Accessing/Intercepting/Modifying HTTP Cookies Accessing/Intercepting/Modifying HTTP Cookies CAPEC-37: Retrieve Embedded Sensitive Data Retrieve Embedded Sensitive Data CAPEC-65: Sniff Application Code Sniff Application Code CAPEC-157: Sniffing Attacks Sniffing Attacks CAPEC-158: Sniffing Network Traffic Sniffing Network Traffic CAPEC-204: Lifting Sensitive Data Embedded in Cache Lifting Sensitive Data Embedded in Cache CAPEC-383: Harvesting Information via API Event Monitoring Harvesting Information via API Event Monitoring CAPEC-384: Application API Message Manipulation via Man-in-the-Middle Application API Message Manipulation via Man-in-the-Middle CAPEC-385: Transaction or Event Tampering via Application API Manipulation Transaction or Event Tampering via Application API Manipulation CAPEC-386: Application API Navigation Remapping Application API Navigation Remapping CAPEC-387: Navigation Remapping To Propagate Malicious Content Navigation Remapping To Propagate Malicious Content CAPEC-388: Application API Button Hijacking Application API Button Hijacking CAPEC-477: Signature Spoofing by Mixing Signed and Unsigned Content Signature Spoofing by Mixing Signed and Unsigned Content CAPEC-609: Cellular Traffic Intercept Cellular Traffic Intercept

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).

Profile Photo
Skynoxk/CVE-2026-27944

Automated exploit script for CVE-2026-27944 (Nginx UI). Downloads/decrypts backups, extracts system secrets, and creates rogue admin accounts for full dashboard access.

Python

Updated: 1 week, 3 days ago
1 stars 0 fork 0 watcher
Born at : March 14, 2026, 2:43 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
NULL200OK/-nginxui_discover

Nginx UI Discovery Scanner - CVE-2026-27944 Version Detector

Python

Updated: 2 weeks ago
1 stars 0 fork 0 watcher
Born at : March 10, 2026, 3:14 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
NULL200OK/CVE-2026-27944

CVE-2026-27944 - Nginx UI Unauthenticated Backup Download & Decryption

Python

Updated: 2 weeks, 1 day ago
3 stars 0 fork 0 watcher
Born at : March 10, 2026, 2:05 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
weefunker/CVE-2026-27944-Lab

Educational lab demonstrating CVE-2026-27944 - Unauthenticated Backup Download with Encryption Key Disclosure in Nginx-UI < 2.3.2. Includes vulnerable server, PoC exploit, and CTF flags.

Dockerfile Python

Updated: 2 weeks, 1 day ago
1 stars 0 fork 0 watcher
Born at : March 10, 2026, 11:23 a.m. This repo has been linked 1 different CVEs too.
Profile Photo
iamthefrogy/Threat-Intel-Atlas

Your single pane of glass for threat intel: a clean, public feed that highlights high‑value security updates and trends.

Python JavaScript CSS HTML

Updated: 2 weeks, 3 days ago
7 stars 2 fork 2 watcher
Born at : Nov. 2, 2025, 5:25 p.m. This repo has been linked 1 different CVEs too.
Profile Photo
J1ezds/Vulnerability-Wiki-page

这是一个每天同步Vulnerability-Wiki中docs-base中内容的项目

HTML

Updated: 2 days, 11 hours ago
8 stars 1 fork 1 watcher
Born at : Sept. 20, 2024, 3:27 a.m. This repo has been linked 280 different CVEs too.
Profile Photo
Threekiii/CVE

一个 CVE 漏洞预警知识库，无 exp/poc，部分包含修复方案。A knowledge base of CVE security vulnerability, no PoCs/exploits.

Updated: 1 week, 1 day ago
161 stars 23 fork 23 watcher
Born at : Jan. 5, 2023, 2:19 a.m. This repo has been linked 238 different CVEs too.
Profile Photo
JoshuaMart/JoshuaMart

None

Updated: 1 week, 4 days ago
0 stars 0 fork 0 watcher
Born at : April 9, 2022, 4:19 p.m. This repo has been linked 44 different CVEs too.
Profile Photo
Threekiii/Awesome-POC

一个漏洞 PoC 知识库。A knowledge base for vulnerability PoCs(Proof of Concept), with 1k+ vulnerabilities.

poc

Dockerfile Java Python

Updated: 4 days, 23 hours ago
4873 stars 963 fork 963 watcher
Born at : Feb. 20, 2022, 6:43 a.m. This repo has been linked 482 different CVEs too.
Profile Photo
nomi-sec/PoC-in-GitHub

📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.

security cve exploit poc vulnerability

Updated: 4 days, 13 hours ago
7589 stars 1242 fork 1242 watcher
Born at : Dec. 8, 2019, 1:03 p.m. This repo has been linked 778 different CVEs too.
Profile Photo
tanjiti/sec_profile

爬取secwiki和xuanwu.github.io/sec.today,分析安全信息站点、安全趋势、提取安全工作者账号(twitter,weixin,github等)

Python HTML

Updated: 5 days, 6 hours ago
1488 stars 243 fork 243 watcher
Born at : Feb. 19, 2019, 10:24 a.m. This repo has been linked 14 different CVEs too.

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

The following list is the news that have been mention CVE-2026-27944 vulnerability anywhere in the article.

  • The Cyber Express
Pixel Watch Users Report Inflated Steps, Missing SpO2 Data

A recent Pixel firmware update released in March 2026 has sparked concern among Pixel Watch users, as reports of inaccurate Fitbit tracking, missing SpO2 readings, and inflated activity data continue ... Read more

Published Date: Mar 20, 2026 (6 days, 7 hours ago)
  • The Cyber Express
Veeam Fixes RCE Bugs in Critical Backup & Replication Platform

An important Veeam security patch to address multiple vulnerabilities in its Backup & Replication platform that potentially allowed attackers to execute malicious code remotely, has been released. The ... Read more

Published Date: Mar 13, 2026 (1 week, 6 days ago)
  • The Cyber Express
Microsoft Patch Tuesday March 2026: Two Zero-Days and Critical RCE Bugs Fixed

The Microsoft Patch Tuesday March 2026 release introduces security updates addressing 79 vulnerabilities, including two publicly disclosed zero-day vulnerabilities and several high-risk issues tied to ... Read more

Published Date: Mar 11, 2026 (2 weeks, 1 day ago)
  • CybersecurityNews
Critical Nginx UI Vulnerabilities Allow Attacker to Download a Full System Backup

Nginx UI Vulnerabilities A newly discovered critical vulnerability in Nginx UI allows unauthenticated attackers to download and decrypt full system backups. Tracked as CVE-2026-27944, this flaw is cat ... Read more

Published Date: Mar 09, 2026 (2 weeks, 3 days ago)
  • The Cyber Express
Critical Nginx UI Vulnerability Exposes Server Backups and Sensitive Data

A newly disclosed vulnerability in Nginx UI, tracked as CVE-2026-27944, has raised major security concerns after researchers confirmed that attackers can download and decrypt server backups without au ... Read more

Published Date: Mar 09, 2026 (2 weeks, 3 days ago)
  • Daily CyberSecurity
Unauthenticated Nginx UI Flaw Leaks Decryption Keys and Server Secrets

Security researchers have uncovered a critical vulnerabilities in Nginx UI, a popular web-based interface used to manage and monitor Nginx server clusters. The flaw, tracked as CVE-2026-27944 with a m ... Read more

Published Date: Mar 08, 2026 (2 weeks, 4 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-2026-27944 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.

  • Initial Analysis by [email protected]

    Mar. 10, 2026

    Action Type Old Value New Value
    Added CPE Configuration OR *cpe:2.3:a:nginxui:nginx_ui:*:*:*:*:*:*:*:* versions up to (excluding) 2.3.3
    Added Reference Type GitHub, Inc.: https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-g9w5-qffc-6762 Types: Exploit, Vendor Advisory
  • New CVE Received by [email protected]

    Mar. 05, 2026

    Action Type Old Value New Value
    Added Description Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.3, the /api/backup endpoint is accessible without authentication and discloses the encryption keys required to decrypt the backup in the X-Backup-Security response header. This allows an unauthenticated attacker to download a full system backup containing sensitive data (user credentials, session tokens, SSL private keys, Nginx configurations) and decrypt it immediately. This issue has been patched in version 2.3.3.
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Added CWE CWE-306
    Added CWE CWE-311
    Added Reference https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-g9w5-qffc-6762
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: 9.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact