In response to the Heartbleed vulnerability discovered in OpenSSL on April 7, 2014, which threatened the security of private internet communications by allowing attackers to steal encryption keys and user credentials, GitHub swiftly implemented a series of protective measures. These included patching all systems with updated OpenSSL versions, recreating SSL keys, revoking older certificates, and resetting browser sessions to mitigate potential session hijacking. Although there was no evidence of exploitation against GitHub, the platform advised users to take precautions by changing passwords, enabling two-factor authentication, and recreating access tokens. GitHub highlighted its preemptive security enhancements, such as deploying Perfect Forward Secrecy, and committed to ongoing vigilance and updates through their blog and Twitter.