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 improper path validation under certain conditions.

CVSS v3.1

8.1 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

CVSS v3.1

8.0 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N

EPSS

0.41% chance of exploitation in the next 30 days, 34th percentile

Published

2026-04-22

Updated

2026-04-23

Proof-of-concept exploits (1)

• https://hackerone.com/reports/3572231

References

• CVE Record
• NVD entry

Related

• CVE-2026-5815
• CVE-2026-58165
• CVE-2026-58144
• CVE-2026-58166
• CVE-2026-58143
• CVE-2026-5817