Denial of Service Vulnerability in GitLab Enterprise Edition
CVE-2026-1184

6.5MEDIUM

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
14 May 2026

What is CVE-2026-1184?

An issue has been identified in GitLab Enterprise Edition that allows an unauthenticated user to trigger a denial of service condition by uploading a specially crafted file. This occurs due to improper validation processes within the system. Affected versions include GitLab EE 11.9, along with certain ranges of versions 18.9, 18.10, and 18.11, which require immediate attention for remediation to prevent exploitation.

Affected Version(s)

GitLab 11.9 < 18.9.7

GitLab 18.10 < 18.10.6

GitLab 18.11 < 18.11.3

References

https://hackerone.com/reports/3515842
technical-descriptionexploitpermissions-required
https://gitlab.com/gitlab-org/gitlab/-/work_items/586634
https://about.gitlab.com/releases/2026/05/13/patch-releas...

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 [a92847865](https://hackerone.com/a92847865) for reporting this vulnerability through our HackerOne bug bounty program
.