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ATR-2026-00064highPrivilege Escalationexperimental

Over-Permissioned MCP Skill

Detects MCP skills that request or exercise permissions far exceeding what their stated function requires. A "spell checker" that requests filesystem write access, network access, and process execution is a strong signal of a trojaned or malicious skill. This rule monitors tool calls for permission-boundary violations.

Severity
high
Category
Privilege Escalation
Scan Target
mcp
Author
ATR Community

Response Actions

block toolalertreduce permissionssnapshot

References

OWASP Agentic
ASI03:2026 - Identity and Privilege Abuse
OWASP LLM
LLM06:2025 - Excessive AgencyLLM03:2025 - Supply Chain Vulnerabilities
MITRE ATLAS
AML.T0040 - AI Model Inference API Access