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ATR-2026-00066criticalTool Poisoningexperimental

Parameter Injection via Tool Arguments

Detects injection attacks delivered through MCP tool arguments. An attacker crafts tool arguments that contain shell metacharacters, SQL injection payloads, path traversal sequences, or template injection syntax. Unlike prompt injection (which targets the LLM), parameter injection targets the tool's backend processing and can lead to RCE, data breach, or privilege escalation on the tool server.

Severity
critical
Category
Tool Poisoning
Scan Target
mcp
Author
ATR Community

Response Actions

block toolalertsnapshotquarantine session

References

OWASP Agentic
ASI02:2026 - Tool Misuse and Exploitation
OWASP LLM
LLM01:2025 - Prompt InjectionLLM05:2025 - Improper Output Handling
MITRE ATLAS
AML.T0051.001 - Indirect