CVE-2026-70426

9.0 criticalEPSS 0.5%

Critical (9.0). EPSS 0.5% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

9.0 critical

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 43% of CVEs (scores of 2026-10-31)
CWE: CWE-502
Published: 2026-08-05
Modified: 2026-08-31
Record from: the NVD, synced 2026-10-19

References

https://www.jenkins.io/security/advisory/2026-08-05/#SECURITY-3911

Check your stack JSON