GitLab CE/EE: Unauthenticated users can crash the Jira integration

Summary

An attacker could have sent a specific request to the Jira integration endpoint, potentially causing the integration to crash. This issue affects all versions of GitLab from 14.4 up to 18.9.1, and versions 18.8 up to 18.8.5. To fix this, update to the latest version of your GitLab installation.

What to do

No fix is available yet. Check with your software vendor for updates.

Affected software

Vendor	Product	Affected versions	Fix available
gitlab	gitlab	> 14.4.0 , <= 18.7.5	–
gitlab	gitlab	> 14.4.0 , <= 18.7.5	–
gitlab	gitlab	> 18.8.0 , <= 18.8.5	–
gitlab	gitlab	> 18.8.0 , <= 18.8.5	–
gitlab	gitlab	18.9.0	–
gitlab	gitlab	18.9.0	–

Original title

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 14.4 before 18.7.5, 18.8 before 18.8.5, and 18.9 before 18.9.1 that could have allowed an unauthenticated user to cause De...

Original description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 14.4 before 18.7.5, 18.8 before 18.8.5, and 18.9 before 18.9.1 that could have allowed an unauthenticated user to cause Denial of Service by sending specially crafted requests to the Jira events endpoint.

nvd CVSS3.1 7.5

Vulnerability type

CWE-770 Allocation of Resources Without Limits

https://about.gitlab.com/releases/2026/02/25/patch-release-gitlab-18-9-1-release... Release Notes Vendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/588206 Broken Link
https://hackerone.com/reports/3519694 Permissions Required