Pydantic AI Harness before 0.59.0 CodeMode Tool Call Limit Bypass via run_code
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.
CVE-2026-114386
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-114386
pydantic-ai-harness
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/pydantic/pydantic-ai",
"vendor": "pydantic",
"product": "pydantic-ai-harness",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "0.59.0",
"versionType": "semver"
}
],
"packageURL": "pkg:pypi/pydantic-ai-harness",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-114386
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #49423 · Revision 1
- Added to Heist Feed
- Publisher date