Disclosure summary
Jenkins contains a remote code execution vulnerability. This vulnerability that could allowed attackers to transfer a serialized Java SignedObject object to the remoting-based Jenkins CLI, that would be deserialized using a new ObjectInputStream, bypassing the existing blocklist-based protection mechanism.
CISA remediation guidance
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Original records & references
PUBLISHED 2025-10-02T00:00:00-04:00
MODIFIED 2025-10-02T00:00:00-04:00
INGESTED 2026-10-06T11:42:57-04:00