CVE-2026-5173

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.

Score

CVSS 3.1 8.5 High

Status

Analyzed - cve@gitlab.com

Published

2026-04-08

Last modified

2026-04-09

Weaknesses

CWE-749

Affected products

• Gitlab (Gitlab)

References

• https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/
• https://gitlab.com/gitlab-org/gitlab/-/work_items/588959