Denial of Service Vulnerability in GitLab EE Affects Multiple Versions
CVE-2026-1387

6.5MEDIUM

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
11 February 2026

What is CVE-2026-1387?

A vulnerability in GitLab EE allows an authenticated user to initiate a Denial of Service attack by uploading a malicious file. This file can be exploited through repeated queries utilizing GraphQL. The flaw affects multiple versions of GitLab EE, making it imperative for users to update to the latest versions to mitigate this risk. The issue highlights the critical need for robust input validation and user access management in application development.

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Deploy the Patch

Affected Version(s)

GitLab 15.6 < 18.6.6

GitLab 18.7 < 18.7.4

GitLab 18.8 < 18.8.4

References

https://gitlab.com/gitlab-org/gitlab/-/issues/587546
issue-trackingpermissions-required
https://hackerone.com/reports/3515994
technical-descriptionexploitpermissions-required
https://about.gitlab.com/releases/2026/02/10/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
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