GitLab WebSocket IAC 16.9.6-18.10.3 (CVE-2026-5173)
CVE-2026-5173 Published on April 8, 2026
Exposed Dangerous Method or Function in GitLab
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.
Vulnerability Analysis
CVE-2026-5173 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity, and no impact on availability.
Weakness Type
Exposed Dangerous Method or Function
The software provides an Applications Programming Interface (API) or similar interface for interaction with external actors, but the interface includes a dangerous method or function that is not properly restricted.
Products Associated with CVE-2026-5173
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Affected Versions
GitLab:- Version 16.9.6 and below 18.8.9 is affected.
- Version 18.9 and below 18.9.5 is affected.
- Version 18.10 and below 18.10.3 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.