Denial of Service Vulnerability in GitLab by GitLab
CVE-2025-2934

4.3MEDIUM

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
9 October 2025

What is CVE-2025-2934?

A vulnerability in GitLab allows an authenticated attacker to exploit webhook endpoints, potentially leading to a denial of service condition. The attacker could configure malicious webhooks that respond with crafted HTTP messages, adversely impacting the application's availability. This issue affects various versions of GitLab CE/EE and has been remediated in recent updates.

Affected Version(s)

GitLab 5.2 < 18.2.8

GitLab 18.3 < 18.3.4

GitLab 18.4 < 18.4.2

References

https://about.gitlab.com/releases/2025/10/08/patch-releas...
https://gitlab.com/gitlab-org/gitlab/-/issues/528979
issue-trackingpermissions-required
https://hackerone.com/reports/3058791
technical-descriptionexploitpermissions-required

CVSS V3.1

Score:
4.3
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 [ppee](https://hackerone.com/ppee) for reporting this vulnerability through our HackerOne bug bounty program
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