CVE-2026-84739
highGitLab has remediated an issue in GitLab CE/EE affecting all versions from 13.11 before 19.2.7, 19.3 before 19.3.3, and 19.4 before 19.4.1 that under certain c…
Vendor / product: Gitlab — gitlab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 13.11 before 19.2.7, 19.3 before 19.3.3, and 19.4 before 19.4.1 that under certain conditions could have allowed an authenticated user to execute arbitrary JavaScript in the context of another user's browser session due to improper sanitization of path components in the merge request diff viewer.
CVSS
8.7
8.7 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N Severity source: NVD CVSS v3.1 (cve@gitlab.com)
Timeline (UTC)
Published: 2026-09-29 10:17
Modified: 2026-10-05 17:06
NVD status: Analyzed
Last synced 2 days ago
Verified against the source API 2026-10-27 06:56 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 ≥13.11.0 <19.2.7, ≥19.3.0 <19.3.3, 19.4.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
References
- https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-4-1-released/ cve@gitlab.com
- https://gitlab.com/gitlab-org/gitlab/-/work_items/627316 cve@gitlab.com
- https://hackerone.com/reports/3938482 cve@gitlab.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:56 UTC · record ↗