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CVE-2026-44284— FastGPT: Stored MCP tool URL SSRF in FastGPT workflow execution

Quick assessment

Affected
labring FastGPT
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FastGPT是labring开源的一款基于大语言模型的开源知识库问答系统。 FastGPT 4.14.17之前版本存在代码问题漏洞，该漏洞源于MCP工具URL处理中存在SSRF保护不一致，可能导致经过身份验证的用户存储内部端点URL，后续工作流执行时连接到内部目标。

CVSS 6.3 · Medium EPSS 0.40% · P32

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
labring FastGPT < 4.14.17 affected
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I. Basic Information for CVE-2026-44284

Vulnerability Information
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Vulnerability Title
FastGPT: Stored MCP tool URL SSRF in FastGPT workflow execution
Source: CVE Program / CVE List V5
Vulnerability Description
FastGPT is an AI Agent building platform. Prior to version 4.14.17, FastGPT had an inconsistent SSRF protection gap in MCP tool URL handling. The direct MCP preview/run endpoints already rejected internal/private network URLs, but the MCP tool create/update endpoints could still save an internal MCP server URL. That stored URL could later be used by workflow execution without revalidating the destination. An authenticated user with permission to create or manage MCP toolsets could store an internal endpoint such as http://localhost:3000/mcp and later cause the FastGPT backend workflow runner to connect to that internal destination. This issue has been patched in version 4.14.17.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
FastGPT 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FastGPT是labring开源的一款基于大语言模型的开源知识库问答系统。 FastGPT 4.14.17之前版本存在代码问题漏洞，该漏洞源于MCP工具URL处理中存在SSRF保护不一致，可能导致经过身份验证的用户存储内部端点URL，后续工作流执行时连接到内部目标。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
labring FastGPT < 4.14.17 -

II. Public POCs for CVE-2026-44284

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III. Intelligence Information for CVE-2026-44284

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Patches & Fixes for CVE-2026-44284 (2)

Vendor Advisories for CVE-2026-44284 (1)

Vendor Pages for CVE-2026-44284 (1)

Same Patch Batch · labring · 2026-05-08 · 6 CVEs total

CVE-2026-42302 9.8 CRITICAL FastGPT: Unauthenticated Remote Code Execution (RCE) via code-server Misconfiguration in a
CVE-2026-42345 7.7 HIGH FastGPT: Cloud metadata endpoint SSRF protection bypass via port specification, IPv6 mappi
CVE-2026-42344 6.3 MEDIUM FastGPT: DNS rebinding TOCTOU bypass in isInternalAddress allows SSRF on all protected end
CVE-2026-42343 FastGPT: Uncontrolled Resource Consumption leading to Sandbox Exhaustion
CVE-2026-44286 FastGPT: SSRF Vulnerability in Laf Workflow Node via Missing Internal Address Validation

IV. Related Vulnerabilities

Same product: FastGPT
Same vendor: labring
Same weakness: CWE-918

V. Comments for CVE-2026-44284

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