Megalodon Malware Compromised 5,500+ GitHub Repos Within 6 Hours

A sweeping automated supply chain attack codenamed “Megalodon” struck GitHub on May 18, 2026, injecting malicious CI/CD backdoors into over 5,500 repositories in less than six hours, marking one of the most aggressive GitHub Actions poisoning campaigns ever recorded. SafeDep discovered that between approximately 11:36 and 17:48 UTC on May 18, 2026, the Megalodon campaign […] The post Megalodon Malware Compromised 5,500+ GitHub Repos Within 6 Hours appeared first on Cyber Security News.