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 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.

CVSS v3 4.8 MEDIUM

4.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/pydantic/pydantic-ai/blob/v2.58.0/src/pydantic_ai_harness/pydantic_ai_harness/code_mode/_toolset.py#L642-L680
https://github.com/pydantic/pydantic-ai/commit/eb27b2b89fe76ae23ee9b6fc9eb4b227a4967949
https://github.com/pydantic/pydantic-ai/pull/10362
https://github.com/pydantic/pydantic-ai/releases/tag/v2.59.0
https://pypi.org/project/pydantic-ai-harness/0.59.0/
https://www.vulncheck.com/advisories/pydantic-ai-harness-before-0.59.0-codemode-tool-call-limit-bypass-via-run-code

Configurations

No configuration.

History

21 Oct 2026, 13:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-21 13:18

Updated : 2026-10-22 17:39

NVD link : CVE-2026-114386

Mitre link : CVE-2026-114386

CVE.ORG link : CVE-2026-114386

JSON object : View

Products Affected

No product.

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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