CVE-2026-84647
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Stored Object Injection in Jenkins Stapler

Publication date: 2026-09-02

Last updated on: 2026-09-02

Assigner: Jenkins Project

Description
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, Stapler does not restrict the types of objects that can be instantiated via form data binding to those compatible with the expected field type, allowing attackers with Overall/Read permission to instantiate types related to configuration for which that field type was not intended.

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Meta Information

Published
2026-09-02
Last Modified
2026-09-02
Generated
2026-09-15
AI Q&A
2026-09-02
EPSS Evaluated
2026-09-14
NVD
CVE-2026-84647
EUVD
EUVD-2026-70113

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
stapler stapler to 2107.v8dfcb_e8ed317 (exc)
jenkins jenkins to 2.579 (inc)
jenkins jenkins to 2.568.2 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-502 The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

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Executive Summary

This vulnerability exists in Stapler, a component used by Jenkins, where it fails to restrict the types of objects that can be created via form data binding. Attackers with Overall/Read permission can exploit this to instantiate unintended types, potentially affecting configuration fields.

Detection Guidance

To detect this vulnerability, check your Jenkins version. If you are running Jenkins 2.579 or earlier (LTS 2.568.2 or earlier), your system is vulnerable. Upgrade to Jenkins 2.580 or LTS 2.568.3 or later to mitigate the issue.

Impact Analysis

An attacker with Overall/Read permission could exploit this to create unintended objects, potentially leading to unauthorized configuration changes or other malicious actions within the Jenkins environment.

Compliance Impact

This vulnerability could lead to unauthorized remote code execution, potentially exposing sensitive data processed by Jenkins. This may violate compliance requirements under GDPR (data protection) and HIPAA (health information security) by enabling unauthorized access to personal or health data.

Mitigation Strategies

Upgrade Jenkins to version 2.580 or later and LTS to 2.568.3 or later to address the deserialization flaw. Remove Overall/Read permissions from untrusted users to limit attack surface.

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