Malicious code in chai-as-testmode (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 (af5e91a44a2eb0773df19fce2096660c285bafbe846a5f09d8bb25ff0eba22b2) The package masquerades as the pino logging library (README badges and lib/ contents mimic pino) but ships a dropper at lib/initializeCaller.js. A self-executing IIFE POSTs the full process.env object to a base64-concealed endpoint that decodes to https://ipcheck-hashed.vercel.app/api/auth/b4dadd6a26d820d08596, using an 'x-secret-header: secret' header, and then passes the HTTP response body to new Function('require', response.data) with require handed in — executing attacker-returned JavaScript in the installer's Node process. The transmitted payload is the entire environment (not a single named variable), which on developer and CI machines typically includes NPM_TOKEN, GITHUB_TOKEN, AWS_* credentials, and other CI secrets. The destination URL is stored base64-encoded to conceal it from casual inspection, and the typosquat-style package name together with pino-themed documentation form a cover story for the dropper.

Source published

4 Oct 2026 23:15:58 UTC

Source modified

4 Oct 2026 23:30:04 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.