CVE-2026-1090
8.7
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| GitLab | GitLab | 10.6 < 18.7.6 | affected |
| GitLab | GitLab | 18.8 < 18.8.6 | affected |
| GitLab | GitLab | 18.9 < 18.9.2 | affected |
Weaknesses
- CWE-79: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: total
References
- https://hackerone.com/reports/3502450
- https://gitlab.com/gitlab-org/gitlab/-/work_items/586478
- https://about.gitlab.com/releases/2026/03/11/patch-release-gitlab-18-9-2-released/
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