Description
An issue has been discovered in GitLab CE/EE affecting all versions from 17.6 before 18.3.6, 18.4 before 18.4.4, and 18.5 before 18.5.2, that, under specific conditions, could have allowed unauthorized users to view confidential branch names by accessing project issues with related merge requests.
References (3)
Core 3
Core References
Broken Link issue-tracking
permissions-required
https://gitlab.com/gitlab-org/gitlab/-/issues/553129
Permissions Required technical-description
exploit
permissions-required
https://hackerone.com/reports/3214025
Release Notes, Vendor Advisory
https://about.gitlab.com/releases/2025/11/12/patch-release-gitlab-18-5-2-released/
Scores
CVSS v3
4.3
EPSS
0.0031
EPSS Percentile
22.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-201
Status
published
Products (1)
gitlab/gitlab
17.6.0 - 18.3.6 (2 CPE variants)
Published
Nov 15, 2025
Tracked Since
Feb 18, 2026