Vulnerability in GitLab
CVE-2026-1101
GitLab has remediated an issue in GitLab EE affecting all versions from 18.2 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user to cause denial of service to the GitLab instance due to improper input validation in GraphQL queries.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (33.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- GitLab — versions 18.2, 18.9, 18.10
Weakness classification (CWE)
References
- hackerone.com/reports/3460228 (Permissions Required, technical-description, permissions-required, exploit)
- gitlab.com/gitlab-org/gitlab/-/work_items/586488 (Broken Link)
- about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/ (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-1101?
- CVE-2026-1101 is a medium-severity vulnerability in GitLab, classified under Improper Validation of Specified Quantity in Input. CVSS score: 6.5/10. Published 2026-04-08.
- How severe is CVE-2026-1101?
- Medium severity. CVSS v3 base score is 6.5 out of 10.