CVE-2026-70426

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.

CVSS v3 9.0 CRITICAL

9.0^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 2.2 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

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

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-05 18:17

Updated : 2026-08-31 19:34

NVD link : CVE-2026-70426

Mitre link : CVE-2026-70426

CVE.ORG link : CVE-2026-70426

JSON object : View

Products Affected

No product.

CWE

CWE-502

Deserialization of Untrusted Data

{"id": "CVE-2026-70426", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-70426", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-05T00:00:00+00:00"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.0, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 2.2}]}, "affected": [{"source": "jenkinsci-cert@googlegroups.com", "affectedData": [{"vendor": "Jenkins Project", "product": "Jenkins", "versions": [{"status": "unaffected", "version": "2.576", "lessThan": "*", "versionType": "maven"}, {"status": "unaffected", "version": "2.568.2", "lessThan": "2.568.*", "versionType": "maven"}], "defaultStatus": "affected"}, {"vendor": "Jenkins Project", "product": "Remoting", "versions": [{"status": "unaffected", "version": "3385.vf1123fb_515da_", "lessThan": "*", "versionType": "maven"}, {"status": "unaffected", "version": "3355.3357.v931d3c992987", "lessThan": "3355.*", "versionType": "maven"}], "defaultStatus": "affected"}]}], "published": "2026-08-05T18:17:12.233", "references": [{"url": "https://www.jenkins.io/security/advisory/2026-08-05/#SECURITY-3911", "source": "jenkinsci-cert@googlegroups.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-502"}]}], "descriptions": [{"lang": "en", "value": "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."}], "lastModified": "2026-08-31T19:34:59.477", "sourceIdentifier": "jenkinsci-cert@googlegroups.com"}