CVE-2026-4398

GitLab has remediated an issue in GitLab EE affecting all versions from 18.3 before 19.1.7, 19.2 before 19.2.5, and 19.3 before 19.3.1 that, under certain conditions, an authenticated user could have assigned compliance frameworks from namespaces they were not authorized to access to their own project, due to missing namespace validation on self-managed instances.

CVSS v3.1

5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

EPSS

0.24% chance of exploitation in the next 30 days, 15th percentile

Published

2026-08-27

Updated

2026-08-28

Proof-of-concept exploits (1)

• https://hackerone.com/reports/3549150

References

• CVE Record
• NVD entry

Related

• CVE-2026-43979
• CVE-2026-43995
• CVE-2026-43978
• CVE-2026-43998
• CVE-2026-43977
• CVE-2026-43999