CVE-2026-44284
MediumCVSS 6.3Exploitation Probability (EPSS)
Low risk15th percentile - higher than 15% of all known CVEs
Summary
FastGPT before 4.14.17 has an inconsistent SSRF protection gap in MCP tool URL handling. Preview/run endpoints reject internal URLs, but create/update endpoints can save an internal URL that is later used without revalidation.
Risk Assessment
An authenticated user with MCP management permissions can force the FastGPT backend to connect to an internal server, potentially leading to data disclosure or SSRF attacks.
Recommendation
Update FastGPT to version 4.14.17, which fixes the inconsistent URL validation.
Original NVD description (English source)
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.