CVE-2026-105806

Payload: Improper access control for MCP API keys

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.

Affected

payloadcms · @payloadcms · payload · plugin-mcp

CVSS v4.0 GITHUB

8.6 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v4.0 GitHub

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

EPSS

0.25% chance of exploitation in the next 30 days, 16th percentile

Published

2026-10-06

Proof-of-concept exploits (2)

• payloadcms/payload/security/advisories/GHSA-2q76-m6w6-qgc6
• payloadcms/payload/releases/tag/v3.88.045286★ · 2026-10-16

Security advisories

• advisories/GHSA-2q76-m6w6-qgc6

References

• CVE Record
• NVD entry

Related

• CVE-2022-27952
• CVE-2023-30843
• CVE-2025-4643
• CVE-2025-4644
• CVE-2026-105804
• CVE-2026-105805