CVE-2026-105844
Received Received - Intake

Prototype Pollution RCE in Payload CMS

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 versions from 3.0.0 before 3.88.0 and canary versions before 4.0.0-canary.27, an unauthenticated user can submit prototype-sensitive field paths when @payloadcms/plugin-import-export is enabled, causing unintended application behavior that can lead to remote code execution. This issue is fixed in versions 3.88.0 and 4.0.0-canary.27.

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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-2026-105844
EUVD
EUVD-2026-93470

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
payloadcms payload >= 3.0.0, < 3.88.0
payloadcms payload >= 4.0.0-canary.0, < 4.0.0-canary.27
@payloadcms plugin-import-export >= 3.0.0, < 3.88.0
@payloadcms plugin-import-export >= 4.0.0-canary.0, < 4.0.0-canary.27

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
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

Payload CMS versions 3.0.0 to 3.88.0 and canary versions before 4.0.0-canary.27 have an unauthenticated remote code execution vulnerability. When the @payloadcms/plugin-import-export plugin is enabled, an attacker can submit prototype-sensitive field paths to manipulate application behavior and execute arbitrary code.

Detection Guidance

Check if @payloadcms/plugin-import-export is installed and enabled in your Payload CMS instance. Verify the version is below 3.88.0 or 4.0.0-canary.27. Inspect network traffic for unauthenticated requests containing prototype-sensitive field paths.

Impact Analysis

This vulnerability allows unauthenticated attackers to execute arbitrary code on the server. This could lead to full system compromise, data theft, unauthorized access, or disruption of services if the system is vulnerable.

Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR's data protection requirements and HIPAA's security rules. Organizations may face legal penalties, reputational damage, and loss of compliance certifications if exploited.

Mitigation Strategies

Immediately update Payload CMS to version 3.88.0 or 4.0.0-canary.27 or later. Disable the @payloadcms/plugin-import-export plugin if not in use. Review system logs for suspicious activity related to prototype pollution or RCE attempts.

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