CVE-2026-25904

Medium severity, CVSS 5.8. EPSS: 0.2% chance of exploitation in the next 30 days.

The Pydantic-AI MCP Run Python tool configures the Deno sandbox with an overly permissive configuration that allows the underlying Python code to access the localhost interface of the host to perform SSRF attacks. Note - the "mcp-run-python" project is archived and unlikely to receive a fix.

Published 2026-02-09. Last modified 2026-06-17.