csc-csc-core (npm) · Malicious Code
Affects csc-csc-coreSource GCVE Database
Malicious package : remove csc-csc-core and rotate any secrets on hosts that installed it.
Data as of 5 Aug 2026, 16:20 UTC
Malicious package
Published to npm · OSV MAL-2026-12667
What to do
Remove csc-csc-core 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 |
|---|---|---|
| npmcsc-csc-core | Affected
| Fixed in– |
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Description
The npm package csc-csc-core version 35.8.6 contains malicious code that, upon requiring the package, downloads and executes a platform-specific binary from obfuscated Cloudflare Workers hostnames. This binary is saved under disguised filenames in temporary directories and executed detached from the main process. The package uses runtime assembly of command and control hostnames and sandbox evasion techniques such as cooldown markers and opt-out flags. The package's README falsely advertises it as a benign base framework module.