CVE-2017-1000353: Jenkins Remote Code Execution Vulnerability

Critical severity, CVSS 9.8. Actively exploited: in CISA KEV since 2025-10-02. EPSS: 99.7% chance of exploitation in the next 30 days.

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.

Affected products

• Jenkins Jenkins: up to and including 2.56; up to and including 2.46.1
• Oracle Communications Cloud Native Core Automated Test Suite: version 1.9.0 only

Published 2018-01-29. Last modified 2026-06-17.