Malicious code in dotenv-precheck (npm)

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (446a8483dbc9e696506f44c6777b7c086b1b919b2585b5e5c99ca5f6e2e19a8e) [email protected] is a credential-stealing package disguised as a dotenv preflight utility. package.json wires index.js as a postinstall script, so it runs automatically on npm install. index.js is heavily obfuscated (obfuscator.io-style hex identifiers, a rotated string array with debugger/toString self-defense, and base64-decoded literals) to hide its runtime strings, which reconstruct at runtime to an api.telegram.org bot endpoint together with a hardcoded bot token and chat ID. On execution the script recursively walks the installer's home directory, including Desktop, Documents, and Downloads, reads text files up to 2MB, and extracts values matching wallet and secret patterns: environment-style entries whose names contain KEY, SECRET, TOKEN, PASSWORD, SEED, MNEMONIC, or WALLET; 0x-prefixed 64-hex Ethereum private keys; Base58 WIF keys; 64-integer Solana key arrays; and BIP-39 mnemonic phrases validated against the BIP-39 word list and SHA-256 checksum. Collected material is uploaded to the attacker's Telegram bot via a sendDocument multipart request to api.telegram.org. No functionality corresponding to the package's stated dotenv-preflight purpose is present. ## Source: ossf-package-analysis (48661f26d5e6181f87722c1e3c5bc997d1cc874999624c83504e0bec3029ff6c) The OpenSSF Package Analysis project identified 'dotenv-precheck' @ 1.1.1 (npm) as malicious. It is considered malicious because: - The package communicates with a domain associated with malicious activity.

Source published

29 Sep 2026 14:09:20 UTC

Source modified

1 Oct 2026 06:00:04 UTC

Observed here

24 Oct 2026 13:17:17 UTC

Source terms

OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.