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Advisories

Pydantic AI Harness before 0.59.0 CodeMode Tool Call Limit Bypass via run_code

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Severity
medium
Date
Affecting

  • pydantic-ai-harness >= 0, < 0.59.0

CWE
  • CWE-770 Allocation of Resources Without Limits or Throttling
CVSS
6.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
Credit
CBF
Description
Pydantic AI Harness before 0.59.0 fails to enforce UsageLimits.tool_calls_limit on nested tool calls dispatched from run_code in the CodeMode toolset. Users or prompt-injected content can make the sandboxed program invoke tools via run_nested_call() without check_before_tool_call, exceeding operator limits on costly or side-effecting tools.

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