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OS Command Injection The advisory has been revoked - it doesn't affect any version of package samba-common  (opens in a new tab)

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EPSS
2.5% (83rd percentile)

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  • Snyk IDSNYK-RHEL7-SAMBACOMMON-17006581
  • published28 May 2026
  • disclosed26 May 2026
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Introduced: 26 May 2026

CVE-2026-4408  (opens in a new tab)
CWE-78  (opens in a new tab)

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:7.

NVD Description

Note: Versions mentioned in the description apply only to the upstream samba-common package and not the samba-common package as distributed by RHEL.

A flaw was found in Samba. A remote attacker can exploit a misconfiguration in Samba file servers and classic domain controllers that use the "check password script" feature. If this script is configured with the %u substitution character, the client-controlled username is passed without proper escaping of shell meta-characters. This vulnerability allows an attacker to achieve remote command execution on the affected system. This issue primarily affects non-standard configurations where the "check password script" is used with %u and the samba-dcerpcd service is started as a system service.