GitLabCVE-2026-84739
GitLab: cross-site scripting
High8.7CVE-2026-84739 · Published Sep 29, 2026
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| GitLab Product | >= 13.11, < 19.2.7 | 19.2.7 |
| >= 19.3, < 19.3.3 | 19.3.3 | |
| >= 19.4, < 19.4.1 | 19.4.1 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-79
More GitLab advisories
All GitLab| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 29 | GitLab: missing authorization | Medium4.3 | 19.2.7+2 more |
| Sep 29 | GitLab: improper authorization | Low3.7 | 19.2.7+2 more |
| Sep 29 | GitLab: improper authorization | Medium4.3 | 19.2.7+2 more |
| Sep 24 | GitLab: code execution | Critical9.9 | 19.2.7+2 more |
| Sep 24 | GitLab: missing authorization | High7.7 | 19.2.7+2 more |
| Sep 24 | GitLab: improper authorization | Medium4.3 | 19.2.7+2 more |