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New ‘Shai-Hulud’ attack breached hundreds of npm and PyPI packages

📅 12 May 2026 at 10:46 UTC📰 Cyber InsiderView original source ↗
New ‘Shai-Hulud’ attack breached hundreds of npm and PyPI packages

A rapidly expanding supply-chain attack tied to the “Mini Shai-Hulud” malware campaign has compromised more than 400 package artifacts across npm, PyPI, and Composer repositories. The breached projects include widely used libraries from TanStack, Mistral AI, UiPath, OpenSearch, and Guardrails AI. Security researchers at Socket, Endor Labs, and Aikido say the malware steals credentials from … The post New ‘Shai-Hulud’ attack breached hundreds of npm and PyPI packages appeared first on CyberInsider.

🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview

A supply-chain attack using the 'Mini Shai-Hulud' malware campaign compromised over 400 package artifacts across npm, PyPI, and Composer repositories, stealing credentials and publishing additional infected packages.

⚙️Technical Details
Affected Systems
npmPyPIComposerGitHubVS CodeClaude Code tooling
Attack Vectors
GitHub Actions weaknessescache poisoningruntime extraction of OIDC publishing tokensoptional dependencies with Git-based referencesmalicious files in .vscode/ and .claude/ directories
💥Impact Assessment
Severity: critical
Who Is at Risk
organizations that installed affected versionsdevelopers who published infected packagesusers of compromised softwareSeverity: critical
🛡️Recommended Actions
1rotate credentials accessible from impacted systems
2audit npm publishing activity and GitHub Actions workflows for unauthorized releases
3search environments for indicators including router_init.js, tanstack_runner.js, etc.
📦Affected Products
@tanstack/react-routerTanStackMistral AIUiPathOpenSearchGuardrails AI

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