CVE-2026-5816
Improper Resolution of Path Equivalence in GitLab
8.1
HIGH
CVSS 3.1
EPSS 0.02%
Description
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.
How to fix CVE-2026-5816
To remediate CVE-2026-5816, upgrade the affected package to a fixed version below.
- —upgrade to 18.10.4 or later
Is CVE-2026-5816 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 18.10.0, < 18.10.4, >= 18.11.0, < 18.11.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N |