CVE-2026-25904 — Overly permissive Deno configuration in mcp-run-python leads to SSRF

CVE-2026-25904

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

Description (CNA)

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 (CNA)

Vendor / product	Versions
Not supplied / Not supplied	affected 0

CWE

CWE-918

References

https://research.jfrog.com/vulnerabilities/mcp-run-python-deno-ssrf-jfsa-2026-001653029/

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.