CVE-2026-2973

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab

Summary

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) NVD OSV

Affected packages

Bitnami gitlab

[{"type":"SEMVER","events":[{"introduced":"17.7.0"},{"fixed":"18.8.7"},{"introduced":"18.9.0"},{"fixed":"18.9.3"},{"introduced":"18.10.0"},{"fixed":"18.10.1"}]}]

References

advisory about.gitlab.com
web gitlab.com
web hackerone.com
web nvd.nist.gov