{"id":"CVE-2026-114386","title":"Pydantic AI Harness before 0.59.0 CodeMode Tool Call Limit Bypass via run_code","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 make the sandboxed program invoke tools via run_n…","severity":"medium","cvss":4.8,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L","cvssSource":"cna","cwe":["CWE-770"],"vendor":"pydantic","product":"pydantic-ai-harness","affected":["pydantic-ai-harness < 0.59.0"],"published":"2026-10-21","updated":"2026-10-21","sourceUpdated":"2026-10-21T12:39:43.886Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-114386","references":[{"url":"https://github.com/pydantic/pydantic-ai/pull/10362"},{"url":"https://github.com/pydantic/pydantic-ai/commit/eb27b2b89fe76ae23ee9b6fc9eb4b227a4967949"},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.59.0","label":"pydantic-ai-harness v2.59.0 Release Notes"},{"url":"https://github.com/pydantic/pydantic-ai/blob/v2.58.0/src/pydantic_ai_harness/pydantic_ai_harness/code_mode/_toolset.py#L642-L680"},{"url":"https://pypi.org/project/pydantic-ai-harness/0.59.0/"},{"url":"https://www.vulncheck.com/advisories/pydantic-ai-harness-before-0.59.0-codemode-tool-call-limit-bypass-via-run-code","label":"VulnCheck Advisory: Pydantic AI Harness before 0.59.0 CodeMode Tool Call Limit Bypass via run_code"}],"tags":["cve.org"],"ingestedAt":"2026-10-21T12:48:53.658Z","slug":"CVE-2026-114386","body":"## Overview\n\nPydantic 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.\n\n## Affected\n\n- `pydantic-ai-harness < 0.59.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":26.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}