CVE-2026-105806 PUBLISHED

Payload: Improper access control for MCP API keys

Assigner: GitHub_M
Reserved: 05.10.2026 Published: 06.10.2026 Updated: 06.10.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS Score: 8.6

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	payloadcms
Product	payload
Versions	Version >= 3.61.0, < 3.88.0 is affected

Vendor	@payloadcms
Product	plugin-mcp
Versions	Version >= 3.61.0, < 3.88.0 is affected

References

Problem Types

CWE-862: Missing Authorization CWE