Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') Affecting libssh 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-LIBSSH-18305735
- published25 Jul 2026
- disclosed21 Jul 2026
- creditUnknown
Introduced: 21 Jul 2026
NewCVE-2026-59846 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') in the ProxyCommand process when a malicious username is expanded through %r, which can inject shell metacharacters, expose environment variables, and cause unintended shell behavior. An attacker can access sensitive information or manipulate the environment by supplying crafted username inputs.
Workaround
This vulnerability can be mitigated by ensuring that connections are not executed with untrusted username inputs.