bs-bs-core (npm) · Malicious Code
Affects bs-bs-coreSource GCVE Database
Malicious package : remove bs-bs-core and rotate any secrets on hosts that installed it.
Data as of 5 Aug 2026, 15:45 UTC
Malicious package
Published to npm · OSV MAL-2026-12519
What to do
Remove bs-bs-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 |
|---|---|---|
| npmbs-bs-core | Affected
| Fixed in– |
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Description
The npm package bs-bs-core version 35.1.6 contains malicious code that downloads and executes a platform-specific binary from obfuscated Cloudflare Workers hostnames. This binary is saved to temporary directories and executed detached from the main process. The package also includes an obfuscated analytics SDK loader that uses child process APIs to spawn the binary. The downloaded executable is unsigned, not hash-verified, and not sourced from the package publisher, indicating a supply chain compromise or malicious intent.