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CVE-2026-85756— SSH.NET: ScpClient allows server-side RCE via default SCP path handling

一分钟漏洞结论

影响对象
sshnet SSH.NET
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。

SSH.NET is a Secure Shell (SSH) library for .NET. Prior to 2026.0.0, ScpClient places caller-supplied remote paths into the command used to run scp on the server, and the default RemotePathTransformation.DoubleQuote transformation cannot safely quote every rem

CVSS 7.5 · High
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一、 漏洞 CVE-2026-85756 基础信息

漏洞信息

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Vulnerability Title
SSH.NET: ScpClient allows server-side RCE via default SCP path handling
来源: CVE Program / CVE List V5
Vulnerability Description
SSH.NET is a Secure Shell (SSH) library for .NET. Prior to 2026.0.0, ScpClient places caller-supplied remote paths into the command used to run scp on the server, and the default RemotePathTransformation.DoubleQuote transformation cannot safely quote every remote command interpreter. When an application passes an attacker-controlled path to a shell-based server, shell metacharacters not neutralized by the active IRemotePathTransformation can execute commands as the authenticated SSH user. Exploitation requires a shell-based server and a path crafted for that shell's parsing rules; non-shell servers and paths fully neutralized by the selected transformation are not affected. RemotePathTransformation.ShellQuote is available for POSIX shells, while SftpClient avoids a remote shell entirely. This issue is fixed in version 2026.0.0.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/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
sshnet SSH.NET < 2026.0.0 -

二、漏洞 CVE-2026-85756 的公开POC

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三、漏洞 CVE-2026-85756 的情报信息

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CVE-2026-85756 厂商页面 (1)

CVE-2026-85756 其他参考 (1)

IV. Related Vulnerabilities

V. Comments for CVE-2026-85756

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