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.
CISA Known Exploited Vulnerability
Date added 2025-10-02 | Due date 2025-10-23
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
References
www.exploit-db.com/exploits/41965/ (41965)
www.securityfocus.com/bid/98056 (98056)
www.oracle.com/security-alerts/cpuapr2022.html
jenkins.io/security/advisory/2017-04-26/
packetstormsecurity.com/...serialization-Code-Execution.html
www.cisa.gov/...abilities-catalog?field_cve=CVE-2017-1000353
www.exploit-db.com/exploits/41965/ (41965)
www.securityfocus.com/bid/98056 (98056)
www.oracle.com/security-alerts/cpuapr2022.html
jenkins.io/security/advisory/2017-04-26/
packetstormsecurity.com/...serialization-Code-Execution.html
nvd.nist.gov (CVE-2017-1000353)
