CVE-2026-2973
5.4
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Summary
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.7 before 18.8.7, 18.9 before 18.9.3, and 18.10 before 18.10.1 that could have allowed an authenticated user to execute arbitrary JavaScript in a user's browser due to improper sanitization of entity-encoded content in Mermaid diagrams.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| GitLab | GitLab | 17.7 < 18.8.7 | affected |
| GitLab | GitLab | 18.9 < 18.9.3 | affected |
| GitLab | GitLab | 18.10 < 18.10.1 | 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: partial
References
- https://hackerone.com/reports/3566802
- https://gitlab.com/gitlab-org/gitlab/-/work_items/591049
- https://about.gitlab.com/releases/2026/03/25/patch-release-gitlab-18-10-1-released/
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