streak-calendar-core (npm) · Malicious Code
Affects streak-calendar-coreSource GCVE Database
Malicious package : remove streak-calendar-core 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-2026-12458
What to do
Remove streak-calendar-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 |
|---|---|---|
| npmstreak-calendar-core | Affected
| Fixed in– |
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Description
The streak-calendar-core npm package version 1.0.0 contains malicious code that executes upon module import. When run inside Windows Subsystem for Linux (WSL) with specific environment conditions, it fetches and extracts a remote archive onto the Windows host filesystem and installs a launcher script in the Windows Startup folder to persistently execute on login. The malicious payload is obfuscated using hex-encoded strings and crosses the WSL boundary to compromise the Windows host from a Linux Node environment.