CVE-2026-3254
lowGitLab 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 authenticat…
Vendor / product: Gitlab — gitlab
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.
CVSS
3.5
3.5 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N Severity source: NVD CVSS v3.1 (cve@gitlab.com)
Timeline (UTC)
Published: 2026-04-22 17:16
Modified: 2026-11-11 23:10
NVD status: Analyzed
Last synced 3 hours ago
Verified against the source API 2026-11-11 23:12 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
gitlab / gitlab 18.11.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://gitlab.com/gitlab-org/gitlab/-/work_items/591587 cve@gitlab.com
- https://hackerone.com/reports/3572752 cve@gitlab.com
Data sources
NVD CVE API 2.0 — fetched 2026-11-11 23:12 UTC · record ↗