CVE-2026-1388CWE-1333

Inefficient Regular Expression Complexity in GitLab

High · published February 25, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
29.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00371 · 29.9th percentile
Weakness
CWE-1333 · Inefficient Regular Expression Complexity
Published
2026-02-25T20:05Z
EPSS history
Timeline
  • 25 FEB 20:05Z
    Inefficient Regular Expression Complexity in GitLab
    cvelistv5