PT-2026-29263 · Labring · Fastgpt

Published 2026-03-31 · Updated 2026-03-31 · CVE-2026-34163

NVD

CVSS v3.1

7.7

High

AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

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.

Fix

SSRF

Weakness Enumeration

CWE-918

Related Identifiers

CVE-2026-34163

Affected Products

Fastgpt

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-34163 · Security Note
• https://github.com/labring/FastGPT/pull/6640 · Note
• https://github.com/labring/FastGPT/security/advisories/GHSA-x9vj-5m4j-9mfv · Note
• https://github.com/labring/FastGPT/releases/tag/v4.14.9.5 · Note
• https://github.com/labring/FastGPT/commit/bc7eae2ed61481a5e322208829be291faec58c00 · Note