CVE-2026-1388

HIGH

7.5

Description

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published2/25/2026

Last Modified2/28/2026

Sourcenvd

Honeypot Sightings0

Affected Products

gitlab:gitlab

Weaknesses (CWE)

CWE-1333

References

https://about.gitlab.com/releases/2026/02/25/patch-release-gitlab-18-9-1-released/(cve@gitlab.com)

https://gitlab.com/gitlab-org/gitlab/-/issues/587560(cve@gitlab.com)

https://hackerone.com/reports/3482893(cve@gitlab.com)

IOC Correlations

No correlations recorded

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