CVE-2026-6976

Authorization Bypass Through User-Controlled Key in GitLab

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.9 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2 that under certain conditions could have allowed an authenticated user with developer-role permissions to hide changes from merge request diff views due to improper input handling of file names.

Affected

GitLab

CVSS v3.1 GITLAB

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

EPSS

0.23% chance of exploitation in the next 30 days, 13th percentile

Published

2026-06-11

Proof-of-concept exploits (1)

• https://hackerone.com/reports/3638136

Security advisories

• https://about.gitlab.com/releases/2026/06/10/patch-release-gitlab-19-0-2-released
• https://gitlab.com/gitlab-org/gitlab/-/work_items/598165

References

• CVE Record
• NVD entry