Supply Chain Attacks
Megalodon: 5,561 GitHub Repos Backdoored via Injected Actions Workflows (May 2026)
In a six-hour window on May 18, 2026, an automated campaign pushed malicious GitHub Actions workflows into 5,561 repositories using credentials harvested by infostealers. We break down the attack chain, the workflow_dispatch dormancy trick, and CI detection.
May 23, 202612 min read