Auth bypass in GitLab
CVE-2026-3074
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.7 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that could have allowed an unauthenticated user to download private debugging symbols from inaccessible projects due to improper access control.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (25.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 25.1% 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 16.7, 18.10, 18.11
Weakness classification (CWE)
References
- hackerone.com/reports/3556163 (Permissions Required, technical-description, permissions-required, exploit)
- gitlab.com/gitlab-org/gitlab/-/work_items/591229 (Not Applicable)
- about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/ (Release Notes)
Frequently asked questions
- What is CVE-2026-3074?
- CVE-2026-3074 is a medium-severity vulnerability in GitLab, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-05-14.
- How severe is CVE-2026-3074?
- Medium severity. CVSS v3 base score is 4.3 out of 10.