CVSS 3.1
5.8 mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:LCVE-2026-25904
Medium (5.8). EPSS 0.2% chance of exploitation in the next 30 days.
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.
Severity
- EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 8% of CVEs (scores of 2026-10-31)
- CWE
- CWE-918
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-6fgp-m6q4-j3q5 | PyPI | mcp-run-python | <=0.0.22 | no fix published |
| PYSEC-2026-2627 | PyPI | mcp-run-python | <=0.0.22 | no fix published |