Medium severity5.8NVD Advisory· Published Feb 9, 2026· Updated Apr 15, 2026

CVE-2026-25904

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

Package	Affected versions	Patched versions
mcp-run-pythonPyPI	<= 0.0.22	—

Affected products

ghsa-coords
pkg:pypi/mcp-run-python
Range: <= 0.0.22

Patches

Vulnerability mechanics

References

github.com/advisories/GHSA-6fgp-m6q4-j3q5ghsaADVISORY
nvd.nist.gov/vuln/detail/CVE-2026-25904ghsaADVISORY
research.jfrog.com/vulnerabilities/mcp-run-python-deno-ssrf-jfsa-2026-001653029ghsaWEB
research.jfrog.com/vulnerabilities/mcp-run-python-deno-ssrf-jfsa-2026-001653029/nvd

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