Denial of Service Vulnerability in GitLab CE/EE by GitLab
CVE-2026-1402

6.5MEDIUM

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
27 May 2026

What is CVE-2026-1402?

A vulnerability exists in GitLab CE/EE that could allow an authenticated user to initiate a denial of service attack due to insufficient validation checks. This flaw affects multiple versions of the software, posing a risk to service availability. GitLab has addressed this issue in subsequent patch releases to enhance protection against potential exploitation, making it crucial for users to upgrade to secure versions to mitigate risks.

Affected Version(s)

GitLab 17.1 < 18.10.7

GitLab 18.11 < 18.11.4

GitLab 19.0 < 19.0.1

References

https://hackerone.com/reports/3517283
technical-descriptionexploitpermissions-required
https://gitlab.com/gitlab-org/gitlab/-/work_items/587569
https://about.gitlab.com/releases/2026/05/27/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
.