CVE Catalog

CVE-2026-114386

MediumCVSS 4.8
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.35%

27th percentile - higher than 27% of all known CVEs

Summary

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 invoke tools via run_nested_call() without check_before_tool_call, exceeding operator limits on costly or side-effecting tools.

Risk Assessment

Limits on costly or side-effecting tools can be exceeded, potentially leading to abuse, unintended actions, or inflated costs.

Recommendation

Upgrade Pydantic AI Harness to version 0.59.0 or later. Until then, restrict access to CodeMode and monitor tool invocations.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS