MSC-2026-12693
Published:October 07, 2026
Updated:October 07, 2026
Impersonation of @tailwindcss/forms (repository field, README, CHANGELOG and workflows copied verbatim) with an obfuscated base64 eval loader prepended to the package main (src/index.js), executed on require with no install hook. The loader tags itself A10-new_npm, queries public Ethereum RPC endpoints (1rpc.io, eth.drpc.org, ethereum-rpc.publicnode.com, eth-mainnet.public.blastapi.io) to read a command-and-control address from a transaction of wallet 0xa322E5f3D311D3080e6f0121063e9aDC2490Ef1a (EtherHiding), downloads an encrypted second stage from http://<c2>:443/0x/cls and /0x/ls, evals it and also runs it in a hidden detached node process. The sandbox resolved the C2 to 91.218.183.174. Publisher fasin81965@hudzer.com (throwaway domain); earlier 0.5.1 was unpublished.
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Contact UsCVSS 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