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.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-6fgp-m6q4-j3q5 MCP Run Python Deno Sandbox Misconfiguration Allows SSRF Attacks via Localhost Access
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 10 Feb 2026 15:45:00 +0000

Type Values Removed Values Added
First Time appeared Pydantic-ai
Pydantic-ai mcp-run-python
Vendors & Products Pydantic-ai
Pydantic-ai mcp-run-python

Mon, 09 Feb 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 09 Feb 2026 09:00:00 +0000

Type Values Removed Values Added
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.
Title Overly permissive Deno configuration in mcp-run-python leads to SSRF
Weaknesses CWE-918
References
Metrics cvssV3_1

{'score': 5.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: JFROG

Published:

Updated: 2026-02-09T14:04:04.176Z

Reserved: 2026-02-08T11:19:42.864Z

Link: CVE-2026-25904

cve-icon Vulnrichment

Updated: 2026-02-09T14:03:39.564Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-02-09T09:16:33.850

Modified: 2026-02-09T16:08:35.290

Link: CVE-2026-25904

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-10T15:37:38Z

Weaknesses