CVE-2026-1090
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.6 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2 that could have allowed an authenticated user, when the `markdown_placeholders` feature flag was enabled, to inject JavaScript in a browser due to improper sanitization of placeholder content in markdown processing.
- Score
- CVSS 3.1 8.7 High
- Status
- Analyzed - cve@gitlab.com
- Published
- 2026-03-11
- Last modified
- 2026-03-12
- Weaknesses
- CWE-79
Affected products
References
- https://about.gitlab.com/releases/2026/03/11/patch-release-gitlab-18-9-2-released/
- https://gitlab.com/gitlab-org/gitlab/-/work_items/586478
- https://hackerone.com/reports/3502450
