Known exploited (CISA KEV) · added 2025-10-02 Exploited per ENISA since 2025-10-02
EPSS
EPSS 99.68 % · percentile 100 (2026-10-27)
State
PUBLISHED
Published
Updated
Assigner
mitre
NVD status
Analyzed
Description
Jenkins versions 2.56 and earlier as well as 2.46.1 LTS and earlier are vulnerable to an unauthenticated remote code execution. An unauthenticated remote code execution vulnerability allowed attackers to transfer a serialized Java `SignedObject` object to the Jenkins CLI, that would be deserialized using a new `ObjectInputStream`, bypassing the existing blacklist-based protection mechanism. We're fixing this issue by adding `SignedObject` to the blacklist. We're also backporting the new HTTP CLI protocol from Jenkins 2.54 to LTS 2.46.2, and deprecating the remoting-based (i.e. Java serialization) CLI protocol, disabling it by default.