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MSC-2026-6371
Published:July 24, 2026
Updated:August 02, 2026
Malicious npm package. dist/index.js hides a dropper behind base64: it spawns 'npm install cors-version --no-save --silent --no-audit --no-fund' via child_process and then require()s the 'cors-version' package to execute it. Both the command and the module name are base64-encoded and the install flags suppress output/audit. Version 0.13.2 swapped the second-stage package from 'cors-update' to 'cors-version'. The cors-version payload is an external package fetched at runtime and is not shipped here. Confirmed malicious: obfuscated dropper that silently installs and executes untrusted external code.
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CVSS v4
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS 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
Weakness Type (CWE)
Embedded Malicious Code
Inclusion of Functionality from Untrusted Control Sphere
Improper Control of Generation of Code ('Code Injection')
Hidden Functionality