CVE-2026-105857
Received Received - Intake

Remote Code Execution in Payload CMS Form Builder

Publication date: 2026-10-06

Last updated on: 2026-10-06

Assigner: GitHub, Inc.

Description
Payload is a free and open source headless content management system. In @payloadcms/plugin-form-builder versions before 3.90.0 and canary versions before 4.0.0-canary.34, an attacker can craft a form submission that executes code remotely on the server. This issue is fixed in versions 3.90.0 and 4.0.0-canary.34.

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Meta Information

Published
2026-10-06
Last Modified
2026-10-06
Generated
2026-10-06
AI Q&A
2026-10-06
EPSS Evaluated
N/A
NVD
CVE-2026-105857
EUVD
EUVD-2026-93501

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
payloadcms payload < 3.90.0
payloadcms payload >= 4.0.0-canary.0, < 4.0.0-canary.34

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-94 The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.
CWE-1321 The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.

Attack-Flow Graph

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Executive Summary

This vulnerability affects Payload, a free and open source headless content management system. It allows an attacker to craft a form submission that executes code remotely on the server. The issue exists in versions before 3.90.0 and canary versions before 4.0.0-canary.34.

Detection Guidance

To detect this vulnerability, check the installed version of @payloadcms/plugin-form-builder. If it is below 3.90.0 or 4.0.0-canary.34, the system is vulnerable. Use commands like 'npm list @payloadcms/plugin-form-builder' or inspect package.json to verify the version.

Impact Analysis

An attacker could exploit this to run malicious code on your server, potentially gaining full control. This could lead to data theft, system compromise, or disruption of services if you use vulnerable versions of Payload.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR and HIPAA requirements for data protection and confidentiality. Organizations may face legal penalties and reputational damage if exploited.

Mitigation Strategies

Immediately update @payloadcms/plugin-form-builder to version 3.90.0 or later, or 4.0.0-canary.34 or later. Remove or disable any vulnerable forms if updating is not immediately possible. Review server logs for suspicious activity.

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