CVE-2026-105806
Received Received - Intake

Authenticated MCP API Key Privilege Escalation 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 @payloadcms/plugin-mcp versions from 3.61.0 until 3.88.0, an authenticated user can manage MCP API keys outside the intended account, enabling privilege escalation through account takeover. This issue is fixed in version 3.88.0.

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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-2026-105806
EUVD
EUVD-2026-93469

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
payloadcms payload >= 3.61.0, < 3.88.0
@payloadcms plugin-mcp >= 3.61.0, < 3.88.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

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Executive Summary

This vulnerability affects Payload, a free and open source headless content management system. It exists in the @payloadcms/plugin-mcp plugin versions 3.61.0 to 3.88.0. An authenticated user can manage MCP API keys outside their intended account, which allows privilege escalation through account takeover.

Impact Analysis

An attacker with authenticated access could escalate privileges and take over other accounts. This could lead to unauthorized access to sensitive data, modification of content, or disruption of services managed by the CMS.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating confidentiality requirements in GDPR and HIPAA. Organizations using affected versions may face compliance violations, legal penalties, and reputational damage.

Mitigation Strategies

Update @payloadcms/plugin-mcp to version 3.88.0 or later to fix the vulnerability. Review all MCP API keys for unauthorized access and revoke any suspicious keys. Ensure only authorized users have administrative privileges.

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