MSC-2026-1991
February 20, 2026
A self-replicating malware worm called Shai-Hulud compromised over npm packages by stealing developer credentials and using them to automatically inject itself into other packages the victim maintains.
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Contact UsCVSS v3
Base Score:
9.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
