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.

Affected packages

Versions sourced from the GitHub Security Advisory.

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

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

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

News mentions

No linked articles in our index yet.

cvss	0.377
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000