Vulnerability Description
FastGPT is an AI Agent building platform. Prior to version 4.14.9.5, FastGPT's MCP (Model Context Protocol) tools endpoints (/api/core/app/mcpTools/getTools and /api/core/app/mcpTools/runTool) accept a user-supplied URL parameter and make server-side HTTP requests to it without validating whether the URL points to an internal/private network address. Although the application has a dedicated isInternalAddress() function for SSRF protection (used in other endpoints like the HTTP workflow node), the MCP tools endpoints do not call this function. An authenticated attacker can use these endpoints to scan internal networks, access cloud metadata services, and interact with internal services such as MongoDB and Redis. This issue has been patched in version 4.14.9.5.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Fastgpt | Fastgpt | < 4.14.9.5 |
Related Weaknesses (CWE)
References
- https://github.com/labring/FastGPT/commit/bc7eae2ed61481a5e322208829be291faec58cPatch
- https://github.com/labring/FastGPT/pull/6640Issue TrackingPatch
- https://github.com/labring/FastGPT/releases/tag/v4.14.9.5ProductRelease Notes
- https://github.com/labring/FastGPT/security/advisories/GHSA-x9vj-5m4j-9mfvExploitMitigationVendor Advisory
FAQ
What is CVE-2026-34163?
CVE-2026-34163 is a vulnerability with a CVSS score of 7.7 (HIGH). FastGPT is an AI Agent building platform. Prior to version 4.14.9.5, FastGPT's MCP (Model Context Protocol) tools endpoints (/api/core/app/mcpTools/getTools and /api/core/app/mcpTools/runTool) accept ...
How severe is CVE-2026-34163?
CVE-2026-34163 has been rated HIGH with a CVSS base score of 7.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-34163?
Check the references section above for vendor advisories and patch information. Affected products include: Fastgpt Fastgpt.