CVE-2026-0752
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
- State
- Published
- Severity
- 8.0 High
- Published
- Feb 25, 2026
- Updated
- Feb 26, 2026
- Reserved
- Jan 8, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.0 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N | GitLab |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
GitLabGitLab |
|
References
- GitLab Issue #585371issue-trackingpermissions-required
- HackerOne Bug Bounty Report #3473276technical-descriptionexploitpermissions-required
- https://about.gitlab.com/releases/2026/02/25/patch-release-gitlab-18-9-1-released/
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