#VU124606 Stored cross-site scripting in Gitlab Community Edition and GitLab Enterprise Edition - CVE-2026-2973

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Main Vulnerability Database Vulnerabilities #VU124606

#VU124606 Stored cross-site scripting in Gitlab Community Edition and GitLab Enterprise Edition - CVE-2026-2973

Published: March 25, 2026 / Updated: March 26, 2026


Vulnerability identifier: #VU124606
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Green
CVE-ID: CVE-2026-2973
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Gitlab Community Edition
GitLab Enterprise Edition
Software vendor:
GitLab, Inc

Description

The vulnerability allows a remote user to execute arbitrary JavaScript in a user's browser.

The vulnerability exists due to improper sanitization of entity-encoded content in the Mermaid diagram renderer when rendering content. A remote user can inject malicious Mermaid diagrams containing encoded scripts, which when viewed by another user, execute arbitrary JavaScript in their browser.


Remediation

Install security update from vendor's website.

External links