CVE-2026-5173
Exposed Dangerous Method or Function in GitLab
Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.9.6 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user to invoke unintended server-side methods through websocket connections due to improper access control.
INFO
Published Date :
April 8, 2026, 11:17 p.m.
Last Modified :
April 16, 2026, 4:44 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update GitLab to a version newer than 18.8.9.
- Update GitLab to a version newer than 18.9.5.
- Update GitLab to a version newer than 18.10.3.
Public PoC/Exploit Available at Github
CVE-2026-5173 has a 2 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
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-2026-5173.
| URL | Resource |
|---|---|
| https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/ | Release Notes Vendor Advisory |
| https://gitlab.com/gitlab-org/gitlab/-/work_items/588959 | Broken Link |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-5173 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-2026-5173
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).
CVE-2026-5173
Python
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-5173 vulnerability anywhere in the article.
-
The Hacker News
⚡ Weekly Recap: Fiber Optic Spying, Windows Rootkit, AI Vulnerability Hunting and More
Monday is back, and the weekend’s backlog of chaos is officially hitting the fan. We are tracking a critical zero-day that has been quietly living in your PDFs for months, plus some aggressive state-s ... Read more
-
The Cyber Express
Adobe Patches Actively Exploited Acrobat Reader Flaw CVE-2026-34621
Adobe has issued emergency security updates addressing a severe Acrobat Reader flaw tracked as CVE-2026-34621, a high-impact Adobe vulnerability that has already been observed being exploited in real- ... Read more
-
Daily CyberSecurity
Security Alert: GitLab Issues Patch for High-Severity Vulnerabilities Across CE and EE
GitLab has released critical security updates for Community Edition (CE) and Enterprise Edition (EE). Versions 18.10.3, 18.9.5, and 18.8.9 address multiple high and medium-severity flaws that could co ... Read more
The following table lists the changes that have been made to the
CVE-2026-5173 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]
Apr. 16, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* versions from (including) 18.9.0 up to (excluding) 18.9.5 *cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* versions from (including) 18.10.0 up to (excluding) 18.10.3 *cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* versions from (including) 16.9.6 up to (excluding) 18.8.9 Added CPE Configuration OR *cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* versions from (including) 18.10.0 up to (excluding) 18.10.3 *cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* versions from (including) 18.9.0 up to (excluding) 18.9.5 *cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* versions from (including) 16.9.6 up to (excluding) 18.8.9 Added Reference Type GitLab Inc.: https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/ Types: Release Notes, Vendor Advisory Added Reference Type GitLab Inc.: https://gitlab.com/gitlab-org/gitlab/-/work_items/588959 Types: Broken Link -
New CVE Received by [email protected]
Apr. 08, 2026
Action Type Old Value New Value Added Description GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.9.6 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user to invoke unintended server-side methods through websocket connections due to improper access control. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N Added CWE CWE-749 Added Reference https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/ Added Reference https://gitlab.com/gitlab-org/gitlab/-/work_items/588959