What is CVE-2026-3254?

CVE-2026-3254 is a low-severity vulnerability in Gitlab, classified under Improper Restriction of Rendered UI Layers or Frames (Clickjacking). CVSS score: 3.5/10. Published 2026-04-22.

How severe is CVE-2026-3254?

Low severity. CVSS v3 base score is 3.5 out of 10.

Vulnerability in Gitlab

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…

EPSS: 0.000 (2.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N.

Affected products

Gitlab — versions 18.11

Weakness classification (CWE)

CWE-1021 — Improper Restriction of Rendered UI Layers or Frames (Clickjacking)

References

HackerOne Bug Bounty Report #3572752 (technical-description, exploit, permissions-required)
gitlab.com/gitlab-org/gitlab/-/work_items/591587

Frequently asked questions

What is CVE-2026-3254?: CVE-2026-3254 is a low-severity vulnerability in Gitlab, classified under Improper Restriction of Rendered UI Layers or Frames (Clickjacking). CVSS score: 3.5/10. Published 2026-04-22.
How severe is CVE-2026-3254?: Low severity. CVSS v3 base score is 3.5 out of 10.