What’s Vulnerable › Vulnerabilities
CVE-2026-40100: FastGPT has Unauthenticated SSRF in /api/core/app/mcpTools/runTool via missing CHECK_INTERNAL_IP default
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-04-10 · updated 2026-10-26
- Weakness: CWE-918
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.
Affected products
- labring FastGPT: before 4.14.10.3 — fixed in 4.14.10.3
How to fix
Upgrade to a fixed version: labring FastGPT 4.14.10.3. Check the vendor advisory for mitigations.
References
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