Command Injection Affecting ssh.net package, versions [,2026.0.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DOTNET-SSHNET-19964072
- published20 Sept 2026
- disclosed17 Sept 2026
- creditNadav0077
Introduced: 17 Sep 2026
NewCVE-2026-85756 (opens in a new tab)How to fix?
Upgrade SSH.NET to version 2026.0.0 or higher.
Overview
SSH.NET is a Secure Shell (SSH) library for .NET, optimized for parallelism and with broad framework support.
Affected versions of this package are vulnerable to Command Injection through the default remote-path handling in ScpClient constructors and initialization in src/Renci.SshNet/ScpClient.cs. An attacker can execute commands on the SSH server as the authenticated SSH user by supplying a crafted remote path to an application that uses SCP against a shell-based server. The vulnerable code embeds caller-supplied remote paths into the server-side scp command using a default double-quote transformation, which does not safely neutralize all shell metacharacters. When an application passes attacker-influenced paths to ScpClient, the server-side shell interprets the path as command syntax instead of a literal file name, leading to remote code execution on the SSH server and corruption of SCP uploads or downloads.