CVE-2026-70432 in Multijob Plugin
Summary
by MITRE • 08/05/2026
A cross-site request forgery (CSRF) vulnerability in Jenkins Multijob Plugin 669.v9d96a_d9c71b_0 and earlier allows attackers to execute arbitrary code in the context of the Jenkins controller JVM.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 08/05/2026
This cross site request forgery vulnerability exists within the Jenkins Multijob Plugin version 669.v9d96a_d9c71b_0 and earlier releases, representing a critical security flaw that can be exploited to execute arbitrary code on the Jenkins controller system. The vulnerability stems from insufficient validation of incoming requests, allowing attackers to craft malicious requests that appear legitimate to the Jenkins server. This type of vulnerability falls under CWE-352, which specifically addresses Cross-Site Request Forgery weaknesses in software applications. The flaw enables unauthorized individuals to manipulate the Jenkins controller's behavior by tricking authenticated users into executing unintended actions through crafted web requests.
The technical implementation of this CSRF vulnerability allows attackers to leverage the trust relationship between the Jenkins controller and its users to perform operations that should require explicit authorization. When a user accesses a malicious website or clicks on a compromised link, the attacker can trigger actions within the Jenkins environment without the user's knowledge or consent. This occurs because the vulnerable plugin fails to properly verify the origin of requests, meaning that legitimate administrative functions can be invoked through maliciously crafted requests that exploit the trust relationship between the user's browser and the Jenkins server.
The operational impact of this vulnerability is severe as it provides attackers with complete control over the Jenkins controller's execution environment. Successful exploitation enables arbitrary code execution within the Jenkins JVM context, which means attackers can potentially access sensitive build data, manipulate continuous integration pipelines, modify job configurations, or even escalate privileges to gain deeper system access. This type of vulnerability represents a significant risk in enterprise environments where Jenkins serves as a critical component for software delivery processes and may contain credentials, source code repositories, or other sensitive information.
Organizations should immediately update their Jenkins Multijob Plugin installations to versions that address this CSRF vulnerability, as the flaw affects all versions prior to the patched release. The mitigation strategy must include implementing proper request origin validation, utilizing anti-CSRF tokens in all plugin interactions, and ensuring that administrative functions require explicit user confirmation before execution. Additionally, security teams should review their Jenkins configurations for additional access controls and consider implementing network segmentation to limit exposure of the Jenkins controller to untrusted networks. This vulnerability aligns with ATT&CK technique T1059 which covers command and script injection attacks, as the arbitrary code execution capability provides attackers with direct system access that can be leveraged for further exploitation activities including privilege escalation and lateral movement within the network environment.
The broader implications of this flaw extend beyond immediate code execution capabilities, as it represents a fundamental breakdown in web application security controls. Jenkins administrators should conduct comprehensive security assessments of their plugin ecosystem to identify similar vulnerabilities in other installed components, particularly those that handle administrative functions or interact with user sessions. Regular vulnerability scanning and penetration testing should be implemented to detect such issues before they can be exploited by malicious actors. The incident underscores the importance of maintaining up-to-date software components and implementing robust input validation controls throughout all application layers to prevent similar CSRF vulnerabilities from compromising system integrity and confidentiality.