GitHub Advisoryadvisory · PyPI
GHSA-3589-pxp7-3gj8 Pydantic AI Harness tool-call limit bypass in nested CodeMode calls
MEDIUM
Official page ↗
- Aliases
- CVE-2026-114386
- Ecosystem
- PyPI
- Packages
- pydantic-ai-harness
- Severity
- Moderate
- CVSS vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
- Weaknesses
- CWE-770
- Reviewed
- 2026-10-23
Affected packages
• PyPI pydantic-ai-harness: < 0.59.0 → fixed in 0.59.0
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.
Related
Alias · CVE (1)
- CVE-2026-114386 Pydantic AI Harness before 0.59.0 fails to enforce UsageLimits.tool_calls_limit on nested tool calls dispatched from run_code in the… vulnerability
Weakness · CWE (1)
- CWE-770 Allocation of Resources Without Limits or Throttling weakness
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-114386 advisory
- https://github.com/pydantic/pydantic-ai/pull/10362 web
- https://github.com/pydantic/pydantic-ai/commit/eb27b2b89fe76ae23ee9b6fc9eb4b227a4967949 web
- https://github.com/pydantic/pydantic-ai package
- https://github.com/pydantic/pydantic-ai/blob/v2.58.0/src/pydantic_ai_harness/pydantic_ai_harness/code_mode/_toolset.py#L642-L680 web
- https://github.com/pydantic/pydantic-ai/releases/tag/v2.59.0 web
- https://pypi.org/project/pydantic-ai-harness/0.59.0 web
- https://www.vulncheck.com/advisories/pydantic-ai-harness-before-0.59.0-codemode-tool-call-limit-bypass-via-run-code web