CVE-2026-6976

Authorization Bypass Through User-Controlled Key in GitLab

State: Published
Severity: 3.7 Low
Published: Jun 11, 2026
Updated: Jun 11, 2026
Reserved: Apr 24, 2026

Description

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.

Scores

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

Weaknesses

CWE-639 Authorization Bypass Through User-Controlled Key

Affected Products

Product	Versions
GitLabGitLab	15.9 to before 18.10.8Affected 18.11 to before 18.11.5Affected 19.0 to before 19.0.2Affected

References

https://gitlab.com/gitlab-org/gitlab/-/work_items/598165
HackerOne Bug Bounty Report #3638136technical-descriptionexploitpermissions-required
https://about.gitlab.com/releases/2026/06/10/patch-release-gitlab-19-0-2-released/

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