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Servers and applications

CVE-2026-3254

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.11 before 18.11.1 that under certain conditions could have allowed an authenticated user to load unauthorized content into another user's browser due to improper input validation in the Mermaid sandbox.

Severity
Low 3.5
Published
22 Apr 2026
Last changed
17 Jun 2026
Added to UpHeron
21 Oct 2026
Sources
NVD

Affected software

SoftwareAffected versions
GitLabServers and applications · cpe:a:gitlab:gitlab
  • Version 18.11.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-3254
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-3254