Command Injection Affecting openssh package, versions [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-CONAN-OPENSSH-21206779
- published18 Oct 2026
- disclosed15 Oct 2026
- creditUnknown
Introduced: 15 Oct 2026
NewCVE-2026-110925 (opens in a new tab)How to fix?
There is no fixed version for openssh.
Overview
Affected versions of this package are vulnerable to Command Injection via the expansion of %u in the configuration when an untrusted username containing special characters such as '$' or a non-trailing backslash is passed on the ssh command line. An attacker can execute arbitrary shell commands by supplying a crafted username that is expanded in ProxyCommand or Match exec directives. This is only exploitable if %u is expanded into a shell command and an untrusted username is provided on the command line.
Workaround
This vulnerability can be mitigated by avoiding the use of untrusted usernames on the ssh command line when ProxyCommand or Match exec expands %u, and by not expanding %u into a shell command.