Large-Scale GitHub Actions Abuse Powers a Distributed cPanel and WHM Exploitation Campaign

A large-scale campaign has abused GitHub Actions by compromising repositories to exploit CVE-2026-41940, a cPanel and WHM authentication bypass vulnerability. Malicious workflow files were pushed to compromised repositories, triggering execution on GitHub-hosted runners that downloaded and ran a Linux-based scanner to target vulnerable servers. The payload scanned for exposed credentials, configuration files, and secrets, exfiltrating them to attacker-controlled infrastructure. This campaign extended beyond a single developer, leveraging distributed infrastructure for scanning, exploitation, and credential harvesting at scale.

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