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CVE-2026-34163

HIGH
7.7

Description

FastGPT is an AI Agent building platform. Prior to version 4.14.9.5, FastGPT's MCP (Model Context Protocol) tools endpoints (/api/core/app/mcpTools/getTools and /api/core/app/mcpTools/runTool) accept a user-supplied URL parameter and make server-side HTTP requests to it without validating whether the URL points to an internal/private network address. Although the application has a dedicated isInternalAddress() function for SSRF protection (used in other endpoints like the HTTP workflow node), the MCP tools endpoints do not call this function. An authenticated attacker can use these endpoints to scan internal networks, access cloud metadata services, and interact with internal services such as MongoDB and Redis. This issue has been patched in version 4.14.9.5.

CVE Details

CVSS v3.1 Score7.7
SeverityHIGH
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Attack VectorNETWORK
ComplexityLOW
Privileges RequiredLOW
User InteractionNONE
Published3/31/2026
Last Modified4/1/2026
Sourcenvd
Honeypot Sightings0

Affected Products

fastgpt:fastgpt

Weaknesses (CWE)

CWE-918

References

https://github.com/labring/FastGPT/commit/bc7eae2ed61481a5e322208829be291faec58c00(security-advisories@github.com)
https://github.com/labring/FastGPT/pull/6640(security-advisories@github.com)
https://github.com/labring/FastGPT/releases/tag/v4.14.9.5(security-advisories@github.com)
https://github.com/labring/FastGPT/security/advisories/GHSA-x9vj-5m4j-9mfv(security-advisories@github.com)

IOC Correlations

No correlations recorded

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