CVE-2026-105851
Received Received - Intake

Access Control Bypass 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 3.90.0 and canary versions before 4.0.0-canary.34, the duplicate operation copies values from a source document even when a field is hidden or its access.read or access.create rule rejects that value for the caller. The disableDuplicate setting does not prevent this access-control bypass. 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-2026-105851
EUVD
EUVD-2026-93494

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
payloadcms payload > 3.0.0, < 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-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
CWE-284 The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

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Executive Summary

Payload CMS versions before 3.90.0 and canary versions before 4.0.0-canary.34 have an access-control bypass vulnerability. The duplicate operation copies values from a source document even when a field is hidden or its access rules reject the value for the caller. The disableDuplicate setting does not prevent this issue.

Detection Guidance

This vulnerability involves an access-control bypass in Payload CMS versions before 3.90.0 and 4.0.0-canary.34. To detect it, check the installed Payload CMS version by inspecting the package.json file or running commands like npm list payload or yarn list payload. If the version is below 3.90.0 or 4.0.0-canary.34, the system is vulnerable.

Impact Analysis

An attacker could exploit this to access or duplicate sensitive data they are not authorized to view or copy. This could lead to unauthorized data exposure, modification, or theft, depending on the system's configuration and data stored.

Compliance Impact

This vulnerability could lead to unauthorized access or exposure of personal or sensitive data, violating GDPR's data protection principles or HIPAA's security requirements. Compliance may be compromised if unauthorized data access occurs.

Mitigation Strategies

Update Payload CMS to version 3.90.0 or later for the stable release, or to version 4.0.0-canary.34 or later for the canary release. This addresses the access-control bypass issue in the duplicate operation.

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