WS-2026-0154
Published:October 06, 2026
Updated:October 22, 2026
@payloadcms/plugin-mcp 0.0.1-alpha.0, 3.61.0 through 3.87.1 and 4.0.0-canary.0 through 4.0.0-canary.30: the MCP login tool let the caller set showHiddenFields (and overrideAccess on 3.x), so login responses could return hidden fields such as credential data (GHSA-jjm7-864w-gg8q)
Affected Packages
https://github.com/payloadcms/payload.git (GITHUB):
Affected version(s) >=v3.61.0 <v3.88.0Fix Suggestion:
Update to version v3.88.0@payloadcms/plugin-mcp (NPM):
Affected version(s) >=4.0.0-canary.0 <4.0.0-canary.31Fix Suggestion:
Update to version 4.0.0-canary.31@payloadcms/plugin-mcp (NPM):
Affected version(s) >=3.61.0 <3.88.0Fix Suggestion:
Update to version 3.88.0Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.1
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE