XSS in Gitlab
CVE-2026-0752
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.2 before 18.7.5, 18.8 before 18.8.5, and 18.9 before 18.9.1 that under certain circumstances, could have allowed an unauthenticated user to inject arbitrary scripts into the Mermaid sandbox UI.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.003 (23.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N.
Affected products
- Gitlab — versions 18.9.0, 18.8, 18.9
Weakness classification (CWE)
References
- cve@gitlab.com (issue-tracking, permissions-required, Broken Link)
- cve@gitlab.com (Permissions Required, technical-description, permissions-required, exploit)
- cve@gitlab.com (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-0752?
- CVE-2026-0752 is a high-severity vulnerability in Gitlab, classified under Cross-site Scripting. CVSS score: 8.0/10. Published 2026-02-25.
- How severe is CVE-2026-0752?
- High severity. CVSS v3 base score is 8.0 out of 10.