CVE-2026-70426Network attack vector

Controller code execution via deserialization filter bypass

Published Aug 5, 2026 · Updated Aug 5, 2026

Deserialization filter bypass in Jenkins Remoting 3384.v60d89463d9e0 and earlier allows remote authenticated users to execute controller code. The fallback class-resolution path fails to apply the JEP-200 filter to deserialized classes on the Jenkins core classpath. An agent process, code on an agent, or a user with Agent/Connect permission can reach the path; affected Jenkins versions are 2.575 and earlier and LTS 2.568.1 and earlier, while Remoting 3355.3357.v931d3c992987 is excepted.

CVSS severity9.0
Critical
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Deserialization filter bypass in Jenkins Remoting 3384.v60d89463d9e0 and earlier allows remote authenticated users to execute controller code. The fallback class-resolution path fails to apply the JEP-200 filter to deserialized classes on the Jenkins core classpath. An agent process, code on an agent, or a user with Agent/Connect permission can reach the path; affected Jenkins versions are 2.575 and earlier and LTS 2.568.1 and earlier, while Remoting 3355.3357.v931d3c992987 is excepted.

The record

CVE
CVE-2026-70426
Published
Aug 5, 2026
Updated
Aug 5, 2026
Vendor
Jenkins Project
Product
Jenkins Remoting
Classifications
CWE-502, T1210
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Jenkins Project · Jenkins RemotingAffected versions are unavailable in this record.
Jenkins Project · JenkinsAffected versions are unavailable in this record.

Published CVSS scores

9.0CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo