CVE-2026-105806: @payloadcms/plugin-mcp improper access control for MCP API keys (< 3.88.0)
- Product
- @payloadcms/plugin-mcp (npm)
- CVE
- CVE-2026-105806
- Affected
- >= 3.61.0, < 3.88.0
- Fixed in
- 3.88.0
Last verified against sources: October 16, 2026
Am I affected?
@payloadcms/plugin-mcp (npm): affected >= 3.61.0, < 3.88.0. Fixed in 3.88.0.
What to do now
- Upgrade @payloadcms/plugin-mcp to 3.88.0 or later, or disable the MCP plugin until upgraded. [1]
General practice, not from the source: if the affected software could read tokens or credentials, rotate them after upgrading; pin versions and review changes before updating tools your agents run.
What happened
- According to GitHub Advisory Database's advisory (Oct 6, 2026), under certain conditions in @payloadcms/plugin-mcp, an authenticated user could manage MCP API keys outside their intended account. [1]
Impact
- An attacker could escalate privileges through account takeover (CVSS 4.0 score 8.6). [1]
What was done
- Patched in @payloadcms/plugin-mcp 3.88.0. [1]
Sources
- GHSA-2q76-m6w6-qgc6 — GitHub Advisory Database
Every statement above was checked against these sources before publishing. Spotted an error? Tell us and we will correct it with a dated note.
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[CVE-2026-105806] CVE-2026-105806: @payloadcms/plugin-mcp improper access control for MCP API keys (< 3.88.0)
Product: @payloadcms/plugin-mcp (npm) | Affected: >= 3.61.0, < 3.88.0 | Fixed in: 3.88.0
Summary: According to GitHub Advisory Database's advisory (Oct 6, 2026), under certain conditions in @payloadcms/plugin-mcp, an authenticated user could manage MCP API keys outside their intended account.
Source & remediation on AgentArmorHQ: https://agentarmorhq.com/incidents/2026/10/cve-2026-105806-payloadcms-plugin-mcp-access-controlCorrections
Report an error or request a correction. We review requests within 5 business days and add a dated correction note.
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