CVE-2023-3909

MEDIUM

Gitlab < 16.3.6 - Denial of Service

Title source: rule

Description

An issue has been discovered in GitLab CE/EE affecting all versions starting from 12.3 before 16.3.6, all versions starting from 16.4 before 16.4.2, all versions starting from 16.5 before 16.5.1. A Regular Expression Denial of Service was possible by adding a large string in timeout input in gitlab-ci.yml file.

References (2)

[Broken Link] https://gitlab.com/gitlab-org/gitlab/-/issues/418763

[Permissions Required] https://hackerone.com/reports/2050269

Scores

CVSS v3 4.3

EPSS 0.0002

EPSS Percentile 6.3%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-1333

Status published

Products (2)

gitlab/gitlab 16.5.0 (2 CPE variants)

gitlab/gitlab 12.3.0 - 16.3.6 (2 CPE variants)

Published Nov 06, 2023

Tracked Since Feb 18, 2026