CVE-2026-5173
High
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.
SeverityHigh
CVSS8.5
Exploit probability—
Product
Gitlab
PublishedApr 8, 2026
First seenApr 8, 2026
Weakness typeCWE-749CWE-749
How to fix
Update
- gitlab gitlab18.8.9, 18.9.5, 18.10.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gitlab gitlab | 16.9.6 ≤ v < 18.8.9, 18.9.0 ≤ v < 18.9.5, 18.10.0 ≤ v < 18.10.3 | 18.8.9, 18.9.5, 18.10.3 |
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