Python
CVE-2026-25904
MEDIUM
GHSA-6fgp-m6q4-j3q5
Severity by source
AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L
Lifecycle Timeline
2Blast Radius
ecosystem impact- 1 pypi packages depend on mcp-run-python (1 direct, 0 indirect)
Ecosystem-wide dependent count for version 0.0.22.
DescriptionCVE.org
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.
AnalysisAI
Pydantic-AI's MCP Run Python tool uses an insufficiently restrictive Deno sandbox configuration that permits Python code to access the host's localhost interface, enabling Server-Side Request Forgery (SSRF) attacks. An attacker can exploit this to probe or interact with services running on the local machine that should be isolated from external access. The archived project status means no patch is expected to be released.
Technical ContextAI
Classified as CWE-918 (Server-Side Request Forgery (SSRF)). 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 ProductsAI
The Pydantic-AI MCP Run Python tool configures the Deno sandbox with an overly permissive configuration that allows the underlying Python code to acce
RemediationAI
Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.
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External POC / Exploit Code
Leaving vuln.today