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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.43%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 8.5 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
- EPSS
- 0.43% probability · 36th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-749
- Affected
- gitlab/gitlab
- Source
- cve@gitlab.com
References
- 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/588959Broken Link
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.