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v4.15.7

rnwood/smtp4devv4.15.7Aug 7, 2026by c121914yu

AI Summary

Maintenance release for FastGPT addressing MCP connection stability and UI configuration limits.

Key Highlights

  • Fixed MCP Streamable HTTP connection failures and fallback logic
  • Adjusted portal shortcut application limit to 3 with backward compatibility
  • Fixed file upload validation logic in application publishing

Full Release Notes

## 变更说明

1. 修复 MCP 使用 Streamable HTTP 连接失败并回退到 SSE 时，请求头可能被重复发送的问题。
2. 门户页快捷应用数量上限调整为 3 个，并兼容校验历史配置中超过上限的快捷应用。
3. 修复应用发布后，文件变量配置允许上传文件，但预签名上传接口错误判断为未开启文件上传的问题。

## What's Changed
* Fix 4.15.x by @c121914yu in https://github.com/labring/FastGPT/pull/7469


**Full Changelog**: https://github.com/labring/FastGPT/compare/v4.15.6...v4.15.7