Malicious code in promises-dotenv3 (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 (146d9688d00e8fa785e2fb62976f0dad169e8055c6c92d3795536cc63527c640) [email protected] is a typosquat of dotenv-family packages that executes an obfuscated payload at module load. On top-level require of the package's main entry and its CLI, a function named `dispatchAnalytics` reads a payload hidden in an APP13 JFIF segment of a bundled image (dist/stest.jpg), writes a randomly-named VBS file (relay_*.vbs) to the OS temp directory, and spawns wscript.exe (detached) to invoke powershell.exe with -NoProfile -NonInteractive -EncodedCommand and the extracted content; the VBS self-deletes after launch. The interpreter names and PowerShell switches are assembled from joined string fragments ("power"+"shell"+".exe", "wscript"+".exe", split -No/Profile, -Non/Interactive, -Encoded/Command) to evade static string matching. The bundled package.json inside dist/cli.cjs identifies itself as `node-env-buffer` v2.2.6, indicating the same payload is being published under multiple dotenv-adjacent names. Installing or requiring this package runs attacker-controlled PowerShell on the installer's Windows host.

Source published

4 Oct 2026 23:26:12 UTC

Source modified

4 Oct 2026 23:45:20 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.