streak-math-lib (npm) · Malicious Code
Affects streak-math-libSource GCVE Database
Malicious package : remove streak-math-lib 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-2026-12469
What to do
Remove streak-math-lib 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 |
|---|---|---|
| npmstreak-math-lib | Affected
| Fixed in– |
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Description
The streak-math-lib npm package version 1.0.0 contains malicious code that activates when imported under Windows Subsystem for Linux (WSL) environments with NODE_ENV not set to 'production'. It downloads and extracts a Windows executable from a Backblaze B2 cloud bucket, installs it into the user's AppData directory, and sets up persistence by placing a loader script in the Windows Startup folder to execute the binary on next login. The malicious payload and persistence mechanism are obfuscated using hex-encoded strings and conditional execution checks.