What is CVE-2026-5816?

CVE-2026-5816 is a high-severity vulnerability in Gitlab, classified under CWE-41. CVSS score: 8.0/10. Published 2026-04-22.

How severe is CVE-2026-5816?

High severity. CVSS v3 base score is 8.0 out of 10.

Vulnerability in Gitlab

CVE-2026-5816

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 imp…

EPSS: 0.004 (33.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N.

Affected products

Gitlab — versions 18.10, 18.11, 18.11.0

Weakness classification (CWE)

CWE-41

References

cve@gitlab.com (Permissions Required, technical-description, permissions-required, exploit)
cve@gitlab.com (Broken Link)
cve@gitlab.com (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2026-5816?: CVE-2026-5816 is a high-severity vulnerability in Gitlab, classified under CWE-41. CVSS score: 8.0/10. Published 2026-04-22.
How severe is CVE-2026-5816?: High severity. CVSS v3 base score is 8.0 out of 10.