In late September 2014, GitHub released a series of updates and patches addressing multiple critical vulnerabilities identified in the GNU bash utility, specifically CVE-2014-6271, CVE-2014-7169, CVE-2014-7186, and CVE-2014-7187, which affected the majority of Unix and Linux systems. These vulnerabilities allowed for the execution of arbitrary commands on affected servers, posing a significant security risk. GitHub responded by providing special patches for GitHub Enterprise users, urging them to upgrade their systems immediately to mitigate potential exploits. Despite extensive penetration testing revealing no vulnerabilities on GitHub.com, including git over SSH, GitHub proactively patched all systems as a precautionary measure. The updates were communicated effectively to ensure that all GitHub Enterprise customers were informed and protected against the vulnerabilities.