CVE-2026-6552 PUBLISHED

Authorization Bypass Through User-Controlled Key in GitLab

Assigner: GitLab
Reserved: 17.04.2026 Published: 11.06.2026 Updated: 11.06.2026

GitLab has remediated an issue in GitLab EE affecting all versions from 15.5 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 group Owner role to take over another group member's GitLab account due to improper authorization in the Group SAML identity management functionality.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
CVSS Score: 8.7

Attack Vector	Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	High	Integrity Impact	High
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	GitLab
Product	GitLab
Versions	Default: unaffected affected from 15.5 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 [cyberjoker](https://hackerone.com/cyberjoker) for reporting this vulnerability through our HackerOne bug bounty program finder

References

Problem Types

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