Bug 2527579 (CVE-2026-84645)

Summary: CVE-2026-84645 jenkins: Jenkins: Remote Code Execution via crafted configuration files
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in Jenkins. This vulnerability allows a remote attacker to achieve remote code execution. By manipulating user-submitted configuration files, an attacker can exploit a deserialization weakness where specially crafted objects can process HTTP requests. This grants unauthorized access to the Script Console, leading to the execution of arbitrary code.
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Description OSIDB Bzimport 2026-09-02 15:58:29 UTC
In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, objects of types marked as storing their configuration in independent top-level configuration files in Jenkins (such as the global configuration and jobs) can appear as nested field values in user-submitted `config.xml` documents and subsequently handle HTTP requests via Stapler, resulting in remote code execution.