Medium 6.3Published May 8, 2026

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

Updated under an hour ago (Oct 28, 2026, 2:10 AM ET)

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It affects labring FastGPT. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for labring FastGPT

Exploited in the last 30 days

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.

CVSS: 6.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Weakness (CWE): CWE-918
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

labring FastGPT labring:fastgpt (from the name)	before 4.14.17	CNA record

References

References

https://github.com/labring/FastGPT/security/advisories/GHSA-cxxj-99f7-f5wq	x-refsource-confirm
https://github.com/labring/FastGPT/pull/6826	x-refsource-misc
https://github.com/labring/FastGPT/commit/c1c6b9520d976d25ed945b5bc4e0768149e6db69	x-refsource-misc
https://github.com/labring/FastGPT/releases/tag/v4.14.17	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.