Improper Resolution of Path Equivalence in Gitlab Community Edition and GitLab Enterprise Edition - CVE-2026-5816
Published: May 18, 2026
Vulnerability identifier: #VU131653
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-5816
CWE-ID: CWE-41
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: GitLab, Inc
Affected software:
Gitlab Community Edition
GitLab Enterprise Edition
Gitlab Community Edition
GitLab Enterprise Edition
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary JavaScript in a user's browser session.
The vulnerability exists due to improper resolution of path equivalence in Web IDE asset when processing path validation under certain conditions. A remote attacker can cause a victim to load a crafted asset path to execute arbitrary JavaScript in a user's browser session.
User interaction is required.
How to mitigate CVE-2026-5816
Install security update from vendor's website.