# CVE-2026-5173

## Summary

- **CVE ID:** CVE-2026-5173
- **Severity:** HIGH
- **CVSS Score:** 8.5 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N)
- **CWE:** CWE-749
- **Published:** Apr 8, 2026
- **Last Modified:** Apr 10, 2026

## 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.

## Affected Products

- GitLab — GitLab (16.9.6)
- GitLab — GitLab (18.9)
- GitLab — GitLab (18.10)

## References

- [CNA](https://gitlab.com/gitlab-org/gitlab/-/work_items/588959)
- [CNA](https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.43%
- **EPSS Percentile:** 35.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._