CVE-2026-105806— Payload: Improper access control for MCP API keys
Quick assessment
Affected
payloadcms payload
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Payload 是一个免费且开源的无头内容管理系统。在 @payloadcms/plugin-mcp 3.61.0 至 3.88.0 版本中，经过身份验证的用户可以管理非所属账户的 MCP API 密钥，从而导致通过账户接管实现权限提升。该问题已在 3.88.0 版本中修复。
Possible ATT&CK Techniques 1 AI
T1078 · Valid Accounts
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I. Basic Information for CVE-2026-105806
Vulnerability Information
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Vulnerability Title
Payload: Improper access control for MCP API keys
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| payloadcms | payload | >= 3.61.0, < 3.88.0 | - |
|
| @payloadcms | plugin-mcp | >= 3.61.0, < 3.88.0 | - |
|
II. Public POCs for CVE-2026-105806
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-105806 (3)
-
https://github.com/payloadcms/payload/releases/tag/v3.88.0 x_refsource_MISC
-
https://github.com/payloadcms/payload/security/advisories/GHSA-2q76-m6w6-qgc6 x_refsource_CONFIRM
Same Patch Batch · payloadcms · 2026-10-06 · 5 CVEs total
| CVE-2026-105845 | 9.8 CRITICAL | Payload: SQL Injection in SQLite and Postgres |
| CVE-2026-105844 | 9.3 CRITICAL | Payload: Prototype pollution in Payload Import Export plugin |
| CVE-2026-105805 | 6.9 MEDIUM | Payload: Sort queries could expose protected field information |
| CVE-2026-105804 | 5.7 MEDIUM | Payload: Password hashes use insufficient PBKDF2 iterations |
IV. Related Vulnerabilities
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-
CVE-2026-105845
Payload: SQL Injection in SQLite and Postgres -
CVE-2026-105844
Payload: Prototype pollution in Payload Import Export plugin -
CVE-2026-105805
Payload: Sort queries could expose protected field informati -
CVE-2026-105804
Payload: Password hashes use insufficient PBKDF2 iterations -
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Payload CMS storage-vercel-blob Adapter Improper Access Cont
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CVE-2026-105845
Payload: SQL Injection in SQLite and Postgres -
CVE-2026-105844
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Payload: Sort queries could expose protected field informati -
CVE-2026-105804
Payload: Password hashes use insufficient PBKDF2 iterations -
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Payload CMS storage-vercel-blob Adapter Improper Access Cont
Same weakness: CWE-862
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V. Comments for CVE-2026-105806
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