OS Command Injection Affecting libssh package, versions <0.11.5-0+deb13u1


Severity

Recommended
0.0
low
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.12% (2nd percentile)

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  • Snyk IDSNYK-ECHOLATEST-LIBSSH-18169597
  • published22 Jul 2026
  • disclosed21 Jul 2026

Introduced: 21 Jul 2026

CVE-2026-59846  (opens in a new tab)
CWE-78  (opens in a new tab)

How to fix?

Upgrade Echo:latest libssh to version 0.11.5-0+deb13u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libssh package and not the libssh package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

A flaw was found in libssh. A malicious username expanded through %r in ProxyCommand handling can inject shell metacharacters, exposing environment variables and causing unintended shell behavior.

CVSS Base Scores

version 3.1