{"id":"CVE-2026-114386","aliases":["EUVD-2026-107233","GHSA-3589-pxp7-3gj8"],"status":"published","title":"Pydantic AI Harness before 0.59.0 CodeMode Tool Call Limit Bypass via run_code","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.","severity":{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00346,"percentile":0.286,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-770"],"published":"2026-10-21T12:39:43Z","modified":"2026-10-28T02:30:53Z","fixes":[{"ecosystem":"PyPI","package":"pydantic-ai-harness","fixed_in":["0.59.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"pydantic-ai-harness","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.59.0"}]}]},{"source":"osv","ecosystem":"PyPI","package":"pydantic-ai-harness","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.59.0"}]}],"versions":["0.1.1","0.1.2","0.10.0","0.11.0","0.12.0","0.13.0","0.14.0","0.15.0","0.16.0","0.17.0","0.18.0","0.18.1","0.2.0","0.2.1","0.20.0","0.21.0","0.22.0","0.23.0","0.24.0","0.25.0","0.26.0","0.27.0","0.28.0","0.28.1","0.29.0","0.29.1","0.3.0","0.30.0","0.31.0","0.32.0","0.33.0","0.34.0","0.35.0","0.36.0","0.4.0","0.5.0","0.52.0","0.53.0","0.54.0","0.55.0","0.56.0","0.57.0","0.58.0","0.6.0","0.7.0","0.7.1","0.8.0","0.9.0"]}],"products":[{"vendor":"pydantic","product":"pydantic-ai-harness"}],"references":[{"url":"https://github.com/pydantic/pydantic-ai/pull/10362","tags":["issue-tracking","patch","fix","web"]},{"url":"https://github.com/pydantic/pydantic-ai/commit/eb27b2b89fe76ae23ee9b6fc9eb4b227a4967949","tags":["patch","fix","web"]},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.59.0","tags":["release-notes","advisory","web"]},{"url":"https://github.com/pydantic/pydantic-ai/blob/v2.58.0/src/pydantic_ai_harness/pydantic_ai_harness/code_mode/_toolset.py#L642-L680","tags":["technical-description","article","web"]},{"url":"https://pypi.org/project/pydantic-ai-harness/0.59.0/","tags":["product","package"]},{"url":"https://www.vulncheck.com/advisories/pydantic-ai-harness-before-0.59.0-codemode-tool-call-limit-bypass-via-run-code","tags":["third-party-advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114386","tags":["advisory"]},{"url":"https://pypi.org/project/pydantic-ai-harness/0.59.0","tags":["web"]},{"url":"https://github.com/advisories/GHSA-3589-pxp7-3gj8"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/114xxx/CVE-2026-114386.json","tags":["advisory"]},{"url":"https://github.com/pydantic/pydantic-ai","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-114386","title":"Pydantic AI Harness before 0.59.0 CodeMode Tool Call Limit Bypass via run_code","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.","status":"published","published":"2026-10-21T12:39:43.886Z","modified":"2026-10-21T19:55:49.371Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T13:39:50.160666Z"}],"euvd":[{"id":"EUVD-2026-107233","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.","status":"published","published":"2026-10-21T12:39:43Z","modified":"2026-10-21T19:55:49Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T16:59:36.259658Z"}],"ghsa":[{"id":"GHSA-3589-pxp7-3gj8","title":"Pydantic AI Harness tool-call limit bypass in nested CodeMode calls","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.","status":"published","published":"2026-10-21T15:42:26Z","modified":"2026-10-23T20:55:51Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"},{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L","level":"medium"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:41:35.723785Z"}],"nvd":[{"id":"CVE-2026-114386","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.","status":"published","published":"2026-10-21T13:18:28.613Z","modified":"2026-10-22T17:39:56.76Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L","level":"medium","assessor":"secondary"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T14:13:02.371082Z"}],"osv":[{"id":"CVE-2026-114386","title":"Pydantic AI Harness before 0.59.0 CodeMode Tool Call Limit Bypass via run_code","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.","status":"published","published":"2026-10-21T12:39:43.886Z","modified":"2026-10-28T02:30:53.870475428Z","cvss":[{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:44:56.310988Z"},{"id":"GHSA-3589-pxp7-3gj8","title":"Pydantic AI Harness tool-call limit bypass in nested CodeMode calls","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.","status":"published","published":"2026-10-21T15:42:26Z","modified":"2026-10-23T21:00:05.311948379Z","cvss":[{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L","level":"medium"},{"version":"4.0","score":6.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"cwes":["CWE-770"],"updated_at":"2026-11-02T15:46:35.050232Z"}]}}