Proxy Injection Vulnerability in GitLab Community and Enterprise Editions
CVE-2025-6454

8.5HIGH

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
12 September 2025

What is CVE-2025-6454?

A vulnerability exists in GitLab Community Edition (CE) and Enterprise Edition (EE) that permits authenticated users to exploit proxy environments. This enables them to make unintended internal requests by injecting specially crafted sequences, potentially leading to unauthorized access to internal network resources. This issue affects a range of GitLab versions, underscoring the importance of timely updates and rigorous security practices.

Affected Version(s)

GitLab 16.11 < 18.1.6

GitLab 18.2 < 18.2.6

GitLab 18.3 < 18.3.2

References

https://about.gitlab.com/releases/2025/09/10/patch-releas...
https://gitlab.com/gitlab-org/gitlab/-/issues/550766
issue-trackingpermissions-required
https://hackerone.com/reports/3162711
technical-descriptionexploitpermissions-required

CVSS V3.1

Score:
8.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Thanks [ppee](https://hackerone.com/ppee) for reporting this vulnerability through our HackerOne bug bounty program
.