CVE-2026-6335
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
- State
- Published
- Severity
- 5.4 Medium
- Published
- May 14, 2026
- Updated
- May 15, 2026
- Reserved
- Apr 15, 2026
Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.11 before 18.11.3 that under certain conditions could have allowed an authenticated user to execute arbitrary code in another user's browser session due to improper sanitization.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.4 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N | GitLab |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
GitLabGitLab |
|
References
- https://gitlab.com/gitlab-org/gitlab/-/work_items/596760
- HackerOne Bug Bounty Report #3673647technical-descriptionexploitpermissions-required
- https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/
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