Denial of Service Vulnerability in GitLab CE/EE
CVE-2026-1662

7.5HIGH

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
25 February 2026

What is CVE-2026-1662?

A vulnerability has been identified in GitLab CE/EE that can be exploited by an unauthenticated user to trigger a Denial of Service condition. This occurs through the submission of specially crafted requests to the Jira events endpoint, impacting multiple versions before the patches were applied. The issue necessitates urgent attention to prevent potential service disruptions.

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Deploy the Patch

Affected Version(s)

GitLab 14.4 < 18.7.5

GitLab 18.8 < 18.8.5

GitLab 18.9 < 18.9.1

References

https://gitlab.com/gitlab-org/gitlab/-/issues/588206
issue-trackingpermissions-required
https://hackerone.com/reports/3519694
technical-descriptionexploitpermissions-required
https://about.gitlab.com/releases/2026/02/25/patch-releas...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
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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