CVE-2026-40100

MEDIUM

FastGPT has Unauthenticated SSRF in /api/core/app/mcpTools/runTool via missing CHECK_INTERNAL_IP default

Title source: cna
STIX 2.1

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.

References (1)

Scores

CVSS v3 5.3
EPSS 0.0007
EPSS Percentile 21.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-918
Status published
Products (2)
fastgpt/fastgpt < 4.14.10.3
labring/FastGPT < 4.14.10.3
Published Apr 10, 2026
Tracked Since Apr 10, 2026