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CVE-2026-70426 is a critical unsafe deserialization vulnerability in Jenkins Remoting. The JEP-200 class filter is not enforced when a serialized class is resolved through a fallback path in the Remoting deserialization implementation. Consequently, an agent-to-controller message can cause the controller to deserialize otherwise blocked classes that are available on the Jenkins core or Java platform classpath. The issue affects Remoting 3384.v60d89463d9e0 and earlier, excluding 3355.3357.v931d3c992987, as shipped with Jenkins 2.575 and earlier and Jenkins LTS 2.568.1 and earlier.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
18 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical Jenkins remote code execution vulnerability caused by a bypass of the JEP-200 security filter in agent-to-controller Remoting deserialization, allowing malicious code execution on the Jenkins controller.
A critical deserialization filter bypass in Jenkins Remoting that allows bypass of the JEP-200 class filter via a fallback deserialization path, affecting Jenkins and Remoting versions listed in the advisory.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.