CVE-2026-3254: Improper Restriction of Rendered UI Layers or Frames in GitLab
Fixed in 18.11.1 · Affected: GitLab before 18.11.1 · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 4% of scored CVEs
DescriptionCVE.org
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 products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- GitLab · GitLabfrom 18.11 before 18.11.1
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- GitLab
- Published
- April 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-3254 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.