CVE-2026-1388
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 9.2 before 18.7.5, 18.8 before 18.8.5, and 18.9 before 18.9.1 that could have allowed an unauthenticated user to cause regular expression denial of service by sending specially crafted input to a merge request endpoint under certain conditions.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| GitLab | GitLab | 9.2 < 18.7.5 | affected |
| GitLab | GitLab | 18.8 < 18.8.5 | affected |
| GitLab | GitLab | 18.9 < 18.9.1 | affected |
Weaknesses
- CWE-1333: CWE-1333: Inefficient Regular Expression Complexity
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: poc
- Automatable: yes
- Technical Impact: partial
References
- https://gitlab.com/gitlab-org/gitlab/-/issues/587560
- https://hackerone.com/reports/3482893
- https://about.gitlab.com/releases/2026/02/25/patch-release-gitlab-18-9-1-released/
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