caldora (npm) · Malicious Code
Affects caldoraSource GCVE Database
Malicious package : remove caldora and rotate any secrets on hosts that installed it.
Data as of 5 Aug 2026, 17:21 UTC
Malicious package
Published to npm · OSV MAL-2026-12344
What to do
Remove caldora 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 |
|---|---|---|
| npmcaldora | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
The npm package caldora version 1.0.0 contains malicious code that executes on import when run in a Linux environment with the Windows Subsystem for Linux (WSL) present and NODE_ENV not set to 'production'. It downloads a binary from a third-party file host and writes it as 'vite-native-helper.exe' into the Windows user's Startup folder, enabling persistent execution on the Windows host at next login. The payload is obfuscated by splitting the URL into parts and is dormant in typical developer or CI environments, targeting WSL developer hosts specifically. The package's declared functionality does not require this native helper, indicating malicious intent.