GitLab CE/EE v15.9-18.10.8/18.11.5/19.0-19.0.2 Auth Dev Hide MR Diff
CVE-2026-6976 Published on June 11, 2026
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.
Vulnerability Analysis
CVE-2026-6976 is exploitable with network access, requires user interaction and a small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is an Insecure Direct Object Reference / IDOR Vulnerability?
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
CVE-2026-6976 has been classified to as an Insecure Direct Object Reference / IDOR vulnerability or weakness.
Products Associated with CVE-2026-6976
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Affected Versions
GitLab:- Version 15.9 and below 18.10.8 is affected.
- Version 18.11 and below 18.11.5 is affected.
- Version 19.0 and below 19.0.2 is affected.