Auth bypass in GitLab
CVE-2026-3553
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 12.0 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 to access confidential issue details due to incorrect authorization checks.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (24.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 24.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- GitLab — versions 12.0, 18.11, 19.0
Weakness classification (CWE)
References
- about.gitlab.com/releases/2026/06/10/patch-release-gitlab-19-0-2-released/ (Release Notes)
- gitlab.com/gitlab-org/gitlab/-/work_items/592295 (Issue Tracking)
- hackerone.com/reports/3578216 (Permissions Required, technical-description, permissions-required, exploit)
Frequently asked questions
- What is CVE-2026-3553?
- CVE-2026-3553 is a low-severity vulnerability in GitLab, classified under Incorrect Authorization. CVSS score: 3.1/10. Published 2026-06-11.
- How severe is CVE-2026-3553?
- Low severity. CVSS v3 base score is 3.1 out of 10.