What’s Vulnerable › Vulnerabilities
CVE-2026-70426
- Severity: critical (CVSS 9.0 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-08-05 · updated 2026-08-31
- Weakness: CWE-502
Description
In Remoting 3384.v60d89463d9e0 and earlier, except 3355.3357.v931d3c992987, included in Jenkins 2.575 and earlier, LTS 2.568.1 and earlier, the JEP-200 class filter is not applied to classes resolved via a fallback path in the Remoting deserialization implementation, allowing agent processes, code running on agents, and attackers with Agent/Connect permission to bypass the JEP-200 deserialization filter for classes on the Jenkins core classpath.
Affected products
- Jenkins: all versions — fixed in 2.576
- Jenkins Project Remoting: all versions — fixed in 3385.vf1123fb_515da_
How to fix
Upgrade to a fixed version: Jenkins 2.576; Jenkins Project Remoting 3385.vf1123fb_515da_. Check the vendor advisory for mitigations.
References
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