A flaw was found in environment-modules. A local attacker can exploit this vulnerability by placing a maliciously named modulefile in a location visible to the victim's `MODULEPATH`. When the victim uses Bash completion for `module` or `ml` commands, the malicious module name, containing shell metacharacters, is evaluated as a command. This can lead to arbitrary command execution in the completing user's shell, impacting their confidentiality, integrity, and availability.

environment-modules: Command injection in environment-modules Bash completion via malicious module names containing shell metacharacters

Affected: Ubuntu:16.04:LTS: modules, Ubuntu:18.04:LTS: modules, Ubuntu:20.04:LTS: modules, Ubuntu:22.04:LTS: modules, Ubuntu:24.04:LTS: modules, Ubuntu:26.04:LTS: modules

A flaw was found in environment-modules. A local attacker can exploit this vulnerability by placing a maliciously named modulefile in a location visible to the victim's `MODULEPATH`. When the victim uses Bash completion for `module` or `ml` commands, the malicious module name, containing shell metacharacters, is evaluated as a command. This can lead to arbitrary command execution in the completing user's shell, impacting their confidentiality, integrity, and availability.