CVE-2026-2973

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

CVSS 5.4 MEDIUMEPSS 0.2%CWE-79

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.4EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

25 Mar 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected products

GitLab · GitLab

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References

https://about.gitlab.com/releases/2026/03/25/patch-release-gitlab-18-10-1-released/https://gitlab.com/gitlab-org/gitlab/-/work_items/591049 https://hackerone.com/reports/3566802