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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.
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Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
OR
*cpe:2.3:a:jenkins:jenkins:*:*:*:*:*:*:*:* versions up to (including) 2.56
OR
*cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:* versions up to (including) 2.56
Changed
Reference Type
CVE: http://packetstormsecurity.com/files/159266/Jenkins-2.56-CLI-Deserialization-Code-Execution.html Types: Third Party Advisory, VDB Entry
CVE: http://packetstormsecurity.com/files/159266/Jenkins-2.56-CLI-Deserialization-Code-Execution.html Types: Permissions Required, Third Party Advisory, VDB Entry
Changed
Reference Type
MITRE: http://packetstormsecurity.com/files/159266/Jenkins-2.56-CLI-Deserialization-Code-Execution.html Types: Third Party Advisory, VDB Entry
MITRE: http://packetstormsecurity.com/files/159266/Jenkins-2.56-CLI-Deserialization-Code-Execution.html Types: Permissions Required, Third Party Advisory, VDB Entry
CVE CISA KEV Update by Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government10/02/2025 9:00:02 PM
Action
Type
Old Value
New Value
Added
Date Added
2025-10-02
Added
Due Date
2025-10-23
Added
Required Action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.