CVE-2026-6063

MEDIUM

Authorization Bypass Through User-Controlled Key in GitLab

Title source: cna

Description

GitLab has remediated an issue in GitLab EE affecting all versions from 11.10 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that under certain conditions could have allowed an authenticated user with developer-role permissions to remove code owner approval rules from merge requests due to improper access control.

References (3)

Core 3

Core References

https://gitlab.com/gitlab-org/gitlab/-/work_items/596332

Exploit technical-description exploit permissions-required

HackerOne Bug Bounty Report #3649087

https://hackerone.com/reports/3649087

https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/

Scores

CVSS v3 4.3

EPSS 0.0001

EPSS Percentile 1.5%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-639

Status published

Products (4)

GitLab/GitLab 11.10 - 18.9.7

gitlab/gitlab 11.10.0 - 18.9.7

GitLab/GitLab 18.10 - 18.10.6

GitLab/GitLab 18.11 - 18.11.3

Published May 14, 2026

Tracked Since May 14, 2026