CVE-2026-55786— Flyto2 Core: Unauthenticated Command Execution via HTTP MCP `execute_module`
一分钟漏洞结论
影响对象
flytohub flyto-core
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Flyto2 Core is an execution kernel for automation and AI-agent workflows. From 2.26.2 until 2.26.4, the HTTP MCP POST /mcp route accepts unauthenticated JSON-RPC tools/call requests and forwards execute_module arguments to the module registry without the requi
影响版本矩阵 1
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| flytohub | flyto-core | >= 2.26.2, < 2.26.4 |
affected |
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一、 漏洞 CVE-2026-55786 基础信息
漏洞信息
尽管我们使用了先进的大模型技术，但其输出仍可能包含不准确或过时的信息。神龙努力确保数据的准确性，但请您根据实际情况进行核实和判断。
Vulnerability Title
Flyto2 Core: Unauthenticated Command Execution via HTTP MCP `execute_module`
来源: CVE Program / CVE List V5
Vulnerability Description
Flyto2 Core is an execution kernel for automation and AI-agent workflows. From 2.26.2 until 2.26.4, the HTTP MCP POST /mcp route accepts unauthenticated JSON-RPC tools/call requests and forwards execute_module arguments to the module registry without the require_auth dependency used by the REST execution routes. An unauthenticated caller can select sandbox.execute_shell and supply its command parameter, which reaches asyncio.create_subprocess_shell with the privileges of the flyto-core server process. The endpoint is reachable locally under the default loopback binding and becomes network reachable when an operator binds the server to a non-loopback interface, allowing arbitrary OS command execution and potential full host compromise. This issue is fixed in version 2.26.4.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| flytohub | flyto-core | >= 2.26.2, < 2.26.4 | - |
|
二、漏洞 CVE-2026-55786 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-55786 补丁与修复 (1)
CVE-2026-55786 其他参考 (2)
-
Release v2.26.4 · flytohub/flyto-core · GitHub x_refsource_MISC
IV. Related Vulnerabilities
V. Comments for CVE-2026-55786
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