post-css-transfer (npm) · Malicious Code
Affects post-css-transferSource GCVE Database
Malicious package : remove post-css-transfer and rotate any secrets on hosts that installed it.
Data as of 26 Oct 2026, 16:15 UTC
Malicious package
Published to npm · OSV MAL-2026-12417
What to do
Remove post-css-transfer from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| npmpost-css-transfer | Affected
| Fixed in– |
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Description
The npm package post-css-transfer version 0.0.1 is a typosquatting malicious package that appends obfuscated code to the legitimate postcss module. This code fetches command-and-control IP addresses by reading Ethereum blockchain transactions, retrieves an XOR-encrypted payload from those hosts, decrypts it, and executes it via a detached Node.js child process. The malicious code is heavily obfuscated to evade detection.