{"id":"CVE-2026-114386","aliases":["GHSA-3589-pxp7-3gj8"],"url":"https://o3.security/vulnerability/CVE-2026-114386","summary":"Pydantic AI Harness before 0.59.0 CodeMode Tool Call Limit Bypass via run_code","details":"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.","published":"2026-10-21T12:39:43.886Z","modified":"2026-10-24T02:51:46.426613405Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"PyPI","name":"pydantic-ai-harness","fixedVersion":"0.59.0"}],"fix":{"url":"https://github.com/pydantic/pydantic-ai/commit/eb27b2b89fe76ae23ee9b6fc9eb4b227a4967949","label":"pydantic/pydantic-ai@eb27b2b"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/114xxx/CVE-2026-114386.json"},{"type":"ADVISORY","url":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.59.0"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114386"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/pydantic-ai-harness-before-0.59.0-codemode-tool-call-limit-bypass-via-run-code"},{"type":"FIX","url":"https://github.com/pydantic/pydantic-ai/commit/eb27b2b89fe76ae23ee9b6fc9eb4b227a4967949"},{"type":"FIX","url":"https://github.com/pydantic/pydantic-ai/pull/10362"},{"type":"PACKAGE","url":"https://github.com/pydantic/pydantic-ai"},{"type":"PACKAGE","url":"https://pypi.org/project/pydantic-ai-harness/0.59.0/"},{"type":"ARTICLE","url":"https://github.com/pydantic/pydantic-ai/blob/v2.58.0/src/pydantic_ai_harness/pydantic_ai_harness/code_mode/_toolset.py#L642-L680"},{"type":"WEB","url":"https://pypi.org/project/pydantic-ai-harness/0.59.0"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-24T02:51:46.426613405Z"}}