Skip to content
OpenAdvisories
Medium · 5.8 CVE-2026-25904 EUVD-2026-6603GHSA-6fgp-m6q4-j3q5PYSEC-2026-2627

Overly permissive Deno configuration in mcp-run-python leads to SSRF

Published Feb 9, 2026 · Updated Feb 9, 2026 · Assigned by JFROG

Description

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.

Affected products

VendorProductAffectedFixed
— mcp-run-python — —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI mcp-run-python <= 0.0.22 — GHSA-6fgp-m6q4-j3q5

References