CVE-2026-25904
Overly permissive Deno configuration in mcp-run-python leads to SSRF
Vexday Risk Score
13Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 5.8EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
09 Feb 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L
Affected products
mcp-run-python