CVE-2026-70426

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{"bugzilla": {"description": "jenkins: remoting: Jenkins Remoting: Arbitrary code execution via deserialization filter bypass", "id": "2511685", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2511685"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.3", "cvss3_scoring_vector": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-502", "details": ["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.", "A flaw was found in Jenkins Remoting. This vulnerability allows agent processes, code running on agents, and attackers with Agent/Connect permission to bypass the JEP-200 deserialization filter. This bypass occurs because the filter is not applied to classes resolved through a fallback path in the Remoting deserialization implementation. Successful exploitation could lead to arbitrary code execution on the Jenkins controller."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-70426", "package_state": [{"cpe": "cpe:/a:redhat:ocp_tools", "fix_state": "Affected", "package_name": "jenkins", "product_name": "OpenShift Developer Tools and Services"}, {"cpe": "cpe:/a:redhat:ocp_tools", "fix_state": "Affected", "package_name": "ocp-tools-4/jenkins-rhel8", "product_name": "OpenShift Developer Tools and Services"}, {"cpe": "cpe:/a:redhat:ocp_tools", "fix_state": "Affected", "package_name": "ocp-tools-4/jenkins-rhel9", "product_name": "OpenShift Developer Tools and Services"}], "public_date": "2026-08-05T17:40:27Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-70426\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-70426\nhttps://www.jenkins.io/security/advisory/2026-08-05/#SECURITY-3911"], "statement": "This Important flaw in Jenkins Remoting allows authenticated attackers or compromised agent processes to execute arbitrary code on the Jenkins controller. The vulnerability stems from an incomplete deserialization filter bypass, enabling full compromise of the Jenkins environment. This impacts Red Hat OpenShift Developer Tools & Services deployments that utilize Jenkins agents, as it could lead to unauthorized control over the build and deployment infrastructure.\nAgent traffic in Red Hat OpenShift Developer Tools is restricted to a cluster's internal pod network which reduces the attack vector from Network to Adjacent.", "threat_severity": "Important"}

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