XSS in GitLab
CVE-2026-13320
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.7 before 18.11.7, 19.0 before 19.0.4, and 19.1 before 19.1.2 that under certain conditions could have allowed an authenticated user to execute arbitrary scripts in another user's browser session due to improper sanitization of user-supplied input.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (30.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 30.8% 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 15.7, 19.0, 19.1
Weakness classification (CWE)
References
- docs.gitlab.com/releases/patches/patch-release-gitlab-19-1-2-released/ (Vendor Advisory)
- gitlab.com/gitlab-org/gitlab/-/work_items/604063 (Broken Link)
- hackerone.com/reports/3816917 (Permissions Required, technical-description, permissions-required, exploit)
Frequently asked questions
- What is CVE-2026-13320?
- CVE-2026-13320 is a high-severity vulnerability in GitLab, classified under Cross-site Scripting. CVSS score: 7.3/10. Published 2026-07-08.
- How severe is CVE-2026-13320?
- High severity. CVSS v3 base score is 7.3 out of 10.