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The ‘Miasma’ worm source code briefly leaked on GitHub

📅 10 June 2026 at 20:27 UTC📰 Bleeping ComputerView original source ↗
The ‘Miasma’ worm source code briefly leaked on GitHub

The Miasma credential-stealing attack framework, which has recently targeted open-source ecosystems through supply-chain attacks, was briefly open-sourced on GitHub. [...]

🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview

The Miasma worm source code was briefly leaked on GitHub, revealing an evolution of the Shai-Hulud worm with autonomous self-propagation capabilities that can quickly expand its reach through supply-chain attacks.

⚙️Technical Details
Affected Systems
GitHub repositoriesnpm packagesPyPI packagesRubyGems packagesCI/CD systemspassword managersKubernetessecret storesSSHAWS Systems Manager (SSM)AI coding tools
Attack Vectors
Supply-chain attacksCloud credential theftGitHub token exfiltrationLateral movement through SSH and AWS SSM
💥Impact Assessment
Severity: critical
Who Is at Risk
Software developers, security teams, and organizations with open-source ecosystems
🛡️Recommended Actions
1Pin project dependencies
2Introduce multi-day delays before adopting newly released package updates
3Validate new builds in isolated test environments
📦Affected Products
npm packagesPyPI packagesRubyGems packagesGitHub repositoriesCI/CD systemspassword managersKubernetessecret storesSSHAWS Systems Manager (SSM)AI coding tools

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