CVE-2026-0752

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

CVSS 8 HIGHEPSS 0.3%CWE-79

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

25 Feb 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.2 before 18.7.5, 18.8 before 18.8.5, and 18.9 before 18.9.1 that under certain circumstances, could have allowed an unauthenticated user to inject arbitrary scripts into the Mermaid sandbox UI.

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

Affected products

GitLab · GitLab

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References

https://about.gitlab.com/releases/2026/02/25/patch-release-gitlab-18-9-1-released/https://gitlab.com/gitlab-org/gitlab/-/issues/585371 https://hackerone.com/reports/3473276