What’s Vulnerable › Vulnerabilities
CVE-2026-3254: Improper Restriction of Rendered UI Layers or Frames in GitLab
- Severity: low (CVSS 3.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-04-22 · updated 2026-06-17
- Weakness: CWE-1021
Description
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.
Affected products
- GitLab: 18.11.0
References
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