Critical

TeamPCP Used Mini Shai-Hulud Worm to Poison Over 400 npm and PyPI Packages

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May 13, 2026 at 3:18 PM

Actively Exploited

Overview

Researchers have discovered that a group known as TeamPCP hijacked OpenID Connect (OIDC) tokens, allowing them to inject a self-replicating worm named Mini Shai-Hulud into over 400 packages on popular repositories like npm and PyPI. This attack specifically targeted packages associated with TanStack, Mistral AI, and UiPath, potentially compromising users who utilize these libraries in their projects. The worm's ability to propagate itself means it could continue to spread, affecting an even wider range of applications. This incident raises serious concerns about the security of software supply chains and the need for developers to remain vigilant about the packages they use. Users and companies relying on these affected packages should take immediate action to verify their dependencies and ensure their systems are secure.

Key Takeaways

Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
Affected Systems: TanStack, Mistral AI, UiPath packages on npm and PyPI
Action Required: Users should verify their dependencies, update to the latest versions of affected packages, and consider implementing additional security measures such as dependency scanning.
Timeline: Newly disclosed

Original Article Summary

Research reveals that TeamPCP hijacked OIDC tokens to poison hundreds of TanStack, Mistral AI, and UiPath packages with the self-propagating Mini Shai-Hulud worm.

Impact

TanStack, Mistral AI, UiPath packages on npm and PyPI

Exploitation Status

This vulnerability is confirmed to be actively exploited by attackers in real-world attacks. Organizations should prioritize patching or implementing workarounds immediately.

Timeline

Newly disclosed

Remediation

Users should verify their dependencies, update to the latest versions of affected packages, and consider implementing additional security measures such as dependency scanning.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to Malware.

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