CVE-2025-12653 MEDIUM

CVE-2025-12653: Authentication Bypass by Spoofing in GitLab

Vendor Gitlab
Product GitLab
Weakness CWE-290
Published November 26, 2025
Last update December 10, 2025
View on NVD All CVEs

CVSS base score

6.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.3 before 18.4.5, 18.5 before 18.5.3, and 18.6 before 18.6.1 that under specific conditions could have allowed an unauthenticated user to join arbitrary organizations by changing headers on some requests.

Key dates

02Disclosure timeline

November 26, 2025 CVE published
December 10, 2025 Record updated