CVE-2026-5816 PUBLISHED

Improper Resolution of Path Equivalence in GitLab

Assigner: GitLab
Reserved: 08.04.2026 Published: 22.04.2026 Updated: 23.04.2026

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
CVSS Score: 8

Attack Vector	Network	Scope	Changed
Attack Complexity	High	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	Required	Availability Impact	None

CVSS 3.1

Product Status

Vendor	GitLab
Product	GitLab
Versions	Default: unaffected affected from 18.10 to 18.10.4 (excl.) affected from 18.11 to 18.11.1 (excl.)

Solutions

Upgrade to versions 18.10.4, 18.11.1 or above.

Credits

Thanks [joaxcar](https://hackerone.com/joaxcar) for reporting this vulnerability through our HackerOne bug bounty program finder

References

Problem Types

CWE-41: Improper Resolution of Path Equivalence CWE