CVE-2026-5173 Details
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.
A vulnerability exists in GitLab Community Edition (CE) and Enterprise Edition (EE) in versions 16.9.6 prior to 18.8.9, 18.9 prior to 18.9.5, and 18.10 prior to 18.10.3. This vulnerability could have allowed an authenticated user to invoke unintended server-side methods through WebSocket connections, due to improper access control. GitLab has released patches for this vulnerability in the versions 18.10.3, 18.9.5, and 18.8.9.
Users are strongly recommended to upgrade to GitLab versions 18.10.3, 18.9.5, or 18.8.9. Instructions for updating GitLab can be found in the GitLab Update documentation. Note that the SLES 12.5 packages for 18.10.3 and 18.9.5 are not present in this release.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 9, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/ | [email protected] | Release NotesVendor Advisory |
| https://gitlab.com/gitlab-org/gitlab/-/work_items/588959 | [email protected] | Broken Link |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-749 | Exposed Dangerous Method or Function | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| gitlab gitlab | >= 16.9.6, < 18.8.9 >= 18.9.0, < 18.9.5 >= 18.10.0, < 18.10.3 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 24, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 16, 2026 | Initial Analysis | [email protected] |
| Apr 8, 2026 | New CVE Received | [email protected] |