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Megalodon campaign compromises over 5,500 GitHub repositories with malicious commits

📅 25 May 2026 at 20:15 UTC📰 Cyber InsiderView original source ↗
Megalodon campaign compromises over 5,500 GitHub repositories with malicious commits

Security researchers have uncovered a large-scale supply chain attack dubbed “Megalodon” that injected malicious GitHub Actions workflows into more than 5,500 repositories. The campaign was discovered by researchers at SafeDep, who identified 5,718 malicious commits pushed across 5,561 repositories within a roughly six-hour window on May 18, in an apparent attempt to steal secrets, credentials, … The post Megalodon campaign compromises over 5,500 GitHub repositories with malicious commits appeared first on CyberInsider.

🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview

A highly automated supply chain attack, dubbed 'Megalodon', compromised over 5,500 GitHub repositories by injecting malicious commits, targeting cloud credentials and secrets used in CI/CD processes.

⚙️Technical Details
💥Impact Assessment
Severity: Critical
🛡️Recommended Actions
1Immediately review recent workflow-related commits
2Rotate exposed secrets
3Enable branch protection rules, require signed commits, and audit CI/CD pipelines for unauthorized modifications
📦Affected Products
Github Repositories: over 5,500

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