GhostAction Compromises About 1,900 GitHub Accounts, Targets Over 30,000 Repositories
The credential-theft campaign known as GhostAction has ramped up, targeting more than 30,000 repositories across 3,000 users and organizations. The spike, according to GitGuardian, was observed on October 8 and 9, 2026. "This resulted from compromising the GitHub accounts of about 1,900 users. It attempted to extract 3,174 secrets from public repositories' CI," security researchers Gaetan Ferry and Guillaume Valadon said . GhostAction is the moniker for a supply chain attack campaign targeting developer infrastructure on GitHub. Originally discovered in September 2025, it involves threat actors compromising legitimate developer accounts to inject malicious GitHub Actions automation workflows into software repositories. Attackers have been found to gain write access to repositories using stolen Personal Access Tokens (PATs) or credentials harvested from infostealer logs and dumps. Using the hijacked maintainer account, they push a malicious workflow file disguis...
Oct 15, 2026