envfile-sync (npm) · Malicious Code
Affects envfile-syncSource GCVE Database
Malicious package : remove envfile-sync and rotate any secrets on hosts that installed it.
Data as of 29 Jun 2026, 22:34 UTC
Malicious package
Published to npm · OSV MAL-2026-6589
What to do
Remove envfile-sync 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 |
|---|---|---|
| npmenvfile-sync | Affected
| Fixed in– |
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Description
The npm package 'envfile-sync' (version 1.0.0) is a malicious typosquatting package branded as 'envsync' that contains hidden native Windows executable code. The JavaScript API is non-functional and serves as a stub, while the actual payload is a 2.9MB undocumented native Windows PE binary loaded and executed via process.dlopen on module import. This native code execution occurs with the privileges of the host process, posing a significant security risk to any Windows user importing this package. The package documentation falsely claims no binaries exist, misleading auditors and users.