CVE-2026-3254
Improper Restriction of Rendered UI Layers or Frames in GitLab
Summary
Improper Restriction of Rendered UI Layers or Frames in GitLab
Original description
The description as published by the source.
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.
References
- advisory github.com
- advisory nvd.nist.gov
- package git://git@gitlab.com:gitlab-org/gitlab.git
- report hackerone.com
- web gitlab.com