Vulnerability in Jenkins Project Jenkins

[ Description ]Official description

Jenkins 2.587 and earlier, LTS 2.580.1 and earlier checks for symbolic links in the path of an extracted file only before creating its parent directories, not immediately before writing it, and allows symbolic links in artifacts to replace existing files or empty directories, allowing attackers with Item/Configure permission to write files to arbitrary locations on the Jenkins controller file system.

[ 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