Shai-Hulud worm copycats emerge after source code leak
Shai-Hulud worm copycats are already attacking NPM developers after its source code leaked, enabling fast supply chain exploitation. The first copycats of the Shai-Hulud worm have already started showing up online, only a few days after the malware’s source code was dumped on GitHub. Researchers had warned this would happen almost immediately, and they were […]

The first copycats of the Shai-Hulud worm have already started showing up online, only a few days after the malware’s source code was dumped on GitHub. Researchers had warned this would happen almost immediately, and they were right.
According to cybersecurity firm Ox Security, at least one threat actor is already using modified versions of the worm in attacks against NPM developers.
Related breach coverage
- First Shai-Hulud Worm Clones Emerge2026-05-18
At least one threat actor has adopted the recently released malware source code in attacks against NPM developers. The post First Shai-Hulud Worm Clones Emerge appeared first on SecurityWeek.
- TeamPCP Ups the Game, Releases Shai-Hulud Worm’s Source Code2026-05-15
The hacking group is encouraging miscreants to use the code in supply chain attacks, promising monetary rewards. The post TeamPCP Ups the Game, Releases Shai-Hulud Worm’s Source Code appeared first on SecurityWeek.
- Supply Chain Security Crisis: Too Many Vulnerabilities, Too Little Visibility2026-05-21
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A compromised maintainer account was used to publish malicious package versions across the @antv namespace. The post Over 320 NPM Packages Hit by Fresh Mini Shai-Hulud Supply Chain Attack appeared first on SecurityWeek.
