CVE-2025-6454

HIGH

GitLab 16.11-18.1.5, 18.2-18.2.5, 18.3-18.3.1 - Authenticated Server-Side Request Forgery via Proxy Request Injection

Title source: llm
STIX 2.1

Description

An issue has been discovered in GitLab CE/EE affecting all versions from 16.11 before 18.1.6, 18.2 before 18.2.6, and 18.3 before 18.3.2 that could have allowed authenticated users to make unintended internal requests through proxy environments by injecting crafted sequences.

References (3)

Core 3
Core References
Broken Link issue-tracking permissions-required
https://gitlab.com/gitlab-org/gitlab/-/issues/550766
Permissions Required technical-description exploit permissions-required
https://hackerone.com/reports/3162711

Scores

CVSS v3 8.5
EPSS 0.0002
EPSS Percentile 5.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-918
Status published
Products (1)
gitlab/gitlab 16.11.0 - 18.1.6 (2 CPE variants)
Published Sep 12, 2025
Tracked Since Feb 18, 2026