CVE-2025-11984

Authentication Bypass Using an Alternate Path or Channel in GitLab

State: Published
Severity: 6.8 Medium
Published: Dec 11, 2025
Updated: Feb 26, 2026
Reserved: Oct 20, 2025

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 13.1 before 18.4.6, 18.5 before 18.5.4, and 18.6 before 18.6.2 that could have allowed an authenticated user to bypass WebAuthn two-factor authentication by manipulating the session state under certain conditions.

Scores

CVSS	Score	Vector	Source
3.1	6.8 Medium	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N	GitLab

Weaknesses

CWE-288 Authentication Bypass Using an Alternate Path or Channel

Affected Products

Product	Versions
GitLabGitLab	13.1 to before 18.4.6Affected 18.5 to before 18.5.4Affected 18.6 to before 18.6.2Affected

References

GitLab Issue #577847issue-trackingpermissions-required
HackerOne Bug Bounty Report #3322714technical-descriptionexploitpermissions-required
https://about.gitlab.com/releases/2025/12/10/patch-release-gitlab-18-6-2-released/

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