GhostAction plants secret-stealing workflows in tens of thousands of GitHub repos
GitGuardian reported on 7 October 2026 that between 31 August and 30 September a malicious workflow, github_actions_security.yml, was pushed to 772 public repositories belonging to 373 GitHub users and organisations, and its 13 October update said a second wave on 8 to 12 October targeted more than 30,000 repositories after the GitHub accounts of about 1,900 users were compromised. The Hacker News, citing OpenSourceMalware, reported a phishing kit on my-github[.]com, a domain resolving to the campaign's exfiltration IP, that sent a maintainer a fake GitHub security alert, captured the password and 2FA code through a reverse proxy and silently authorised an OAuth device flow with repo, workflow and read:org scopes. Six days after GitHub began blocking the workflow on 9 October, a second stage appeared that commits a VS Code task set to run when a folder is opened, and GitGuardian later counted 72,026 commits to 22,964 public repositories between 13 and 21 October.
- Social engineering assessment
- Secure development training
- Incident response