MajorCritical vulnerability

CVE-2026-105806: Payload: Improper access control for MCP API keys

GitHub Advisories · officialPublished Oct 6, 2026Risk 37/100

### Impact Under certain conditions, an authenticated user could manage MCP API keys outside their intended account allowing an attacker to escalate privileges through account takeover. Applications that do not use `@payloadcms/plugin-mcp` are not affected. ### Patches Users should upgrade to `@payloadcms/plugin-mcp` version `3.88.0` or later. ### Workarounds Upgrading is recommended. Until then, disable the MCP plugin or restrict MCP API-key management to trusted users.

Recommended action

Upgrade affected packages to a patched version: @payloadcms/plugin-mcp 3.88.0.

Technical details

Vendor: Not specified
Product: @payloadcms/plugin-mcp
Exploitation: none known
Evidence: official

Evidence and sources

This record is attributed to GitHub Advisories. Exploitation status and remediation guidance are kept separate from the vulnerability's technical severity.

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