Malicious code in chai-as-rendered (npm)

CISA KEV lists vulnerabilities known to be exploited. FIRST EPSS estimates the likelihood of exploitation in the next 30 days. An unavailable score does not mean zero risk.

No exploitation or prediction data is available here for these CVEs. This does not mean they are safe or unlikely to be exploited.

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (545ba2341881e666831e81156a815fdfac738830ec2918167e4c5fd3c42294bf) Typosquat of chai-as-promised. The package's exported middleware spawns a detached child process (lib/caller.js) that fetches a JSON payload from a base64-obfuscated jsonstorage.net URL (https://api.jsonstorage.net/v1/json/2ef8c758-a96f-459e-b036-b3b90379a165/f89e8264-86c2-4684-94da-c3f82d59370f) and evaluates the returned.cookie string via new Function.constructor("require", s)(require), giving the fetched code full require access on the installer's host. The remote URL and request headers are stored as base64 strings under fake process.env names (DEV_API_KEY, DEV_SECRET_KEY, DEV_SECRET_VALUE) and decoded with atob() at runtime to conceal the destination. The package name and keywords (fast, logger, stream, json) impersonate pino while the package name typosquats chai-as-promised.

Source published

5 Aug 2026 12:59:03 UTC

Source modified

24 Sep 2026 09:30:11 UTC

Saved 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

Source: osv · OSV · upstream source license applies. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.