Worse Than Heartbleed? Meet ShellShock: A New Security Threat For OS X and Linux

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MakeUseOf

12 min read · Apr 15, 2026

Worse Than Heartbleed? Meet ShellShock: A New Security Threat For OS X and Linux

By downloading this free guide, you agree to receive regular updates on the latest cool apps, product reviews, and giveaways from MakeUseOf. A serious security issue with the Bash shell – a major component of both most UNIX-like operating systems – has been discovered, with significant implications for computer security worldwide. The issue is present in all versions of the Bash scripting language up to version 4.3, which affects a majority of Linux machines, and the entirety of computers running OS X. Curious about how it works and how to protect yourself? Read on for more information.

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