CVE-2026-117618

In Jenkins 2.587 and earlier, LTS 2.580.1 and earlier, the HTTP endpoint for creating the first user account does not check whether the setup wizard has been completed, resulting in a race condition that allows unauthenticated attackers to create an administrator account while the initial user account is being replaced.

Status

Received - jenkinsci-cert@googlegroups.com

Published

2026-10-28

Last modified

2026-10-28

Affected products

• Jenkins (Jenkins Project)

References

• https://www.jenkins.io/security/advisory/2026-10-28/#SECURITY-4122