Denial of Service Vulnerability in GitLab CE/EE Affecting Multiple Versions
CVE-2025-3601

6.5MEDIUM

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
27 August 2025

What is CVE-2025-3601?

A vulnerability has been identified in GitLab CE/EE that allows authenticated users to trigger a Denial of Service (DoS) condition. This occurs when users submit URLs that generate excessively large responses. The affected versions include all from 8.15 to 18.1.5, 18.2 to 18.2.5, and 18.3 to 18.3.1. This can potentially disrupt the service for legitimate users, raising significant security concerns for organizations relying on GitLab for their projects.

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Affected Version(s)

GitLab 8.15 < 18.1.5

GitLab 18.2 < 18.2.5

GitLab 18.3 < 18.3.1

References

https://gitlab.com/gitlab-org/gitlab/-/issues/536034
issue-trackingpermissions-required
https://hackerone.com/reports/3050155
technical-descriptionexploitpermissions-required

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

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