OS Command Injection in yast2-auth-client via Unvalidated AD Config
CVE-2026-59681 Published on September 1, 2026
yast2-auth-client: OS command injection via unsanitized Organizational Unit / dnsHostName in AD join
A OS command injection vulnerability in yast2-auth-client allows an attacker who controls Active Directory configuration values to execute arbitrary commands as root on the configured host.
Auth::AuthConf in src/lib/auth/authconf.rb assembles the Samba net ads join, net ads lookup -S and net ads testjoin invocations by interpolating configuration values into a single command string and passing that string to Open3.popen2 / Open3.capture2, which causes Ruby to run it through /bin/sh. The Organizational Unit (ou), dnshostname, AD user name and AD domain name values are neither validated nor shell-quoted.
Vulnerability Analysis
CVE-2026-59681 can be exploited with network access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
What is a Shell injection Vulnerability?
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
CVE-2026-59681 has been classified to as a Shell injection vulnerability or weakness.
Affected Versions
SUSE yast2-auth-client:- Before and including 5.0.4 is affected.