CVE-2026-2973
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
5.4
MEDIUM
CVSS 3.1
EPSS 0.04%
Description
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.
How to fix CVE-2026-2973
To remediate CVE-2026-2973, upgrade the affected package to a fixed version below.
- —upgrade to 18.8.7 or later
Is CVE-2026-2973 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 17.7.0, < 18.8.7, >= 18.9.0, < 18.9.3, >= 18.10.0, < 18.10.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |