CVE-2026-40100

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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/labring/FastGPT/security/advisories/GHSA-jrhc-f3j7-f8g4	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:fastgpt:fastgpt:*:*:*:*:*:*:*:*

History

26 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) FastGPT es una plataforma de creación de Agentes de IA. Anteriormente a la versión 4.14.10.3, el endpoint /API/core/app/mcpTools/runTool acepta URLs arbitrarias sin autenticación. La verificación de IP interna en isInternalAddress() solo bloquea IPs privadas cuando CHECK_INTERNAL_IP=true, lo cual no es la configuración predeterminada. Esto permite a atacantes no autenticados realizar SSRF contra recursos de red internos. Esta vulnerabilidad se corrigió en la versión 4.14.10.3.

Information

Published : 2026-04-10 17:17

Updated : 2026-10-26 21:10

NVD link : CVE-2026-40100

Mitre link : CVE-2026-40100

CVE.ORG link : CVE-2026-40100

JSON object : View

Products Affected

fastgpt

fastgpt

CWE

CWE-918

Server-Side Request Forgery (SSRF)

{"id": "CVE-2026-40100", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-40100", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-15T14:45:56.717074Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "labring", "product": "FastGPT", "versions": [{"status": "affected", "version": "< 4.14.10.3"}]}]}], "published": "2026-04-10T17:17:12.997", "references": [{"url": "https://github.com/labring/FastGPT/security/advisories/GHSA-jrhc-f3j7-f8g4", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-918"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "FastGPT es una plataforma de creaci\u00f3n de Agentes de IA. Anteriormente a la versi\u00f3n 4.14.10.3, el endpoint /API/core/app/mcpTools/runTool acepta URLs arbitrarias sin autenticaci\u00f3n. La verificaci\u00f3n de IP interna en isInternalAddress() solo bloquea IPs privadas cuando CHECK_INTERNAL_IP=true, lo cual no es la configuraci\u00f3n predeterminada. Esto permite a atacantes no autenticados realizar SSRF contra recursos de red internos. Esta vulnerabilidad se corrigi\u00f3 en la versi\u00f3n 4.14.10.3."}], "lastModified": "2026-10-26T21:10:00.170", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:fastgpt:fastgpt:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2E93E71B-0D3A-4C6D-9679-EC1FA760E111", "versionEndExcluding": "4.14.10.3"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}