CVE-2026-1184
Deserialization of Untrusted Data in GitLab
- State
- Published
- Severity
- 6.5 Medium
- Published
- May 14, 2026
- Updated
- May 14, 2026
- Reserved
- Jan 19, 2026
Description
GitLab has remediated an issue in GitLab EE affecting all versions from 11.9 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that could have allowed an unauthenticated user to cause denial of service by uploading a specially crafted file due to improper validation.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | GitLab |
Weaknesses
- CWE-502 Deserialization of Untrusted Data
Affected Products
| Product | Versions |
|---|---|
GitLabGitLab |
|
References
- HackerOne Bug Bounty Report #3515842technical-descriptionexploitpermissions-required
- https://gitlab.com/gitlab-org/gitlab/-/work_items/586634
- https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-released/
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