CVE-2016-0634: GNU Bash

High severity, CVSS 7.5. EPSS: 6% chance of exploitation in the next 30 days.

The expansion of '\h' in the prompt string in bash 4.3 allows remote authenticated users to execute arbitrary code via shell metacharacters placed in 'hostname' of a machine.

Affected products

• GNU Bash: version 4.3 only

Published 2017-08-28. Last modified 2026-06-17.