Bug 2527588 (CVE-2026-84654)

Summary: CVE-2026-84654 org.kohsuke.stapler/stapler: jenkins: Stapler: Global configuration modification via form data binding
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in Stapler, a web framework used by Jenkins. This vulnerability allows an attacker, who can submit configuration forms, to modify public static fields of configuration objects. This modification can lead to changes that apply globally across the entire Jenkins instance, potentially impacting its operation and security.
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Description OSIDB Bzimport 2026-09-02 16:00:14 UTC 
In Stapler 2107.v8dfcb_e8ed317 and earlier, except 2088.2093.vd7c3e58008a_6, included in Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, form data binding allows setting public static fields of the bound configuration object, allowing attackers who can submit configuration forms to modify public static fields of the configuration objects those forms are bound to, resulting in changes that apply globally to the Jenkins instance.