CVE-2026-6976 PUBLISHED

Authorization Bypass Through User-Controlled Key in GitLab

Assigner: GitLab
Reserved: 24.04.2026 Published: 11.06.2026 Updated: 11.06.2026

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.

Metrics

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

Product Status

Vendor GitLab
Product GitLab
Versions Default: unaffected
  • affected from 15.9 to 18.10.8 (excl.)
  • affected from 18.11 to 18.11.5 (excl.)
  • affected from 19.0 to 19.0.2 (excl.)

Solutions

Upgrade to versions 18.10.8, 18.11.5, 19.0.2 or above.

Credits

  • Thanks [xorz](https://hackerone.com/xorz) for reporting this vulnerability through our HackerOne bug bounty program finder

References

Problem Types

  • CWE-639: Authorization Bypass Through User-Controlled Key CWE