CVE-2026-40100

Description

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.

PUBLISHED Reserved 2026-04-09 | Published 2026-04-10 | Updated 2026-04-15 | Assigner GitHub_M

Problem types

CWE-918: Server-Side Request Forgery (SSRF)

Product status

References

github.com/...astGPT/security/advisories/GHSA-jrhc-f3j7-f8g4

cve.org (CVE-2026-40100)

nvd.nist.gov (CVE-2026-40100)

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