worm
Safeguard articles tagged "worm" — guides, analysis, and best practices for software supply chain and application security.
4 articles
Your Dependency Incident Runbook Assumes a Fixed List of Bad Packages
Most supply chain runbooks say: get the affected package list, search lockfiles, remediate. Against a worm that adds packages while you work, every one of those steps is wrong.
Python's .pth Files Are a Code Execution Primitive, and Attackers Noticed
The June 2026 PyPI worm wave used a *-setup.pth file to execute at interpreter startup — before your code, before your imports, on every single python invocation. It then fetched the Bun JavaScript runtime to run its payload. If your supply chain model stops at setup.py, it has a hole in it.
Lessons from Shai-Hulud: The First Self-Propagating npm Worm
In September 2025, npm faced a supply chain attack that spread by itself — stealing developers' tokens, then using them to trojanize the victims' own packages. Here is how it worked.
Shai-Hulud: The Self-Replicating npm Worm That Hit 500+ Packages
On September 15, 2025, a self-replicating npm worm dubbed Shai-Hulud backdoored more than 500 packages, including @ctrl/tinycolor and CrowdStrike libraries, by pivoting through stolen publish tokens.
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