Vulnerability in Jenkins Project Jenkins

[ Description ]Official description

Jenkins 2.587 and earlier, LTS 2.580.1 and earlier does not consistently enforce the restriction on deserializing objects of types marked as storing their configuration in independent top-level configuration files as nested values, allowing attackers to bypass the root element check and potentially inject nested objects.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund28 Oct 2026WID-SEC-2026-4233

  Jenkins: Multiple vulnerabilities Translated from German

  CVE-2026-117621CVE-2026-117616CVE-2026-117622+12 more CVEs

[ References ]References

• www.jenkins.io/security/advisory/2026-10-28MitigationVendor Advisory