medium5.3
CVE-2026-40100
FastGPT is an AI Agent building platform.
Impact
FastGPT is an AI Agent building platform. Prior to 4.14.10.3, the /api/core/app/mcpTools/runTool endpoint accepts arbitrary URLs without authentication. The internal IP check in isInternalAddress() only blocks private IPs when CHECK_INTERNAL_IP=true, which is not the default. This allows unauthenticated attackers to perform SSRF against internal network resources. This vulnerability is fixed in 4.14.10.3.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Fastgpt | Fastgpt | before 4.14.10.3 |