CVE-2026-6976

Authorization Bypass Through User-Controlled Key in GitLab

CVSS 3.7 LOWEPSS 0.2%CWE-639

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.

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

Affected products

GitLab · GitLab

public PoCs found — 1

cve_referencehackerone.com/reports/3638136unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

Want to know if your infrastructure is exposed to this?

Talk to TrueHacking →

References

https://about.gitlab.com/releases/2026/06/10/patch-release-gitlab-19-0-2-released/https://gitlab.com/gitlab-org/gitlab/-/work_items/598165 https://hackerone.com/reports/3638136