CVE-2026-1388 HIGH

CVE-2026-1388: Inefficient Regular Expression Complexity in GitLab

Vendor Gitlab
Product GitLab
Weakness CWE-1333
Published February 25, 2026
Last update February 26, 2026
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 25, 2026 CVE published
February 26, 2026 Record updated