CVE-2026-70426CWE-502insecure-deserialization

CVE-2026-70426

Critical · published August 5, 2026

CVSS v3.1
9.0
EPSS
1%
Percentile
43.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00515 · 43.0th percentile
Weakness
CWE-502 · Deserialization of Untrusted Data
Published
2026-08-05T22:17Z
References (1)
https://www.jenkins.io/security/advisory/2026-08-05/#SECURITY-3911 · [email protected]
EPSS history
Timeline
  • 05 AUG 17:40Z
    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…
    cvelistv5