MAL-2026-10408

    Dashboard / Malicious Package / MAL-2026-10408

    MAL-2026-10408

    Published: 13 Jul 2026Last Modified: 13 Jul 2026

    Summary: Malicious code in chain-js-utils (npm)

    Details: Source: amazon-inspector (1a928356b1418a88bc30f460c42b1d9f3050ca3e67deb674307269a8c752d1d8) The package impersonates pino (ships pino's docs and headers, exports a `pino` alias) but its actual runtime is an Express middleware factory in file.js that spawns a detached `node lib/vcall.js` child on each invocation. lib/vcall.js issues an HTTPS GET to https://api.jsonsilo.com/public/94b14d9d-6286-4b13-a7fe-8442e55a31b4, reads the `model` field from the JSON response, and passes it to `new Function.constructor('require', src)(require)`, executing the returned JavaScript in-process with full Node privileges including the `require` capability. Retries up to five times. The remote payload is mutable, unauthenticated, and unpinned, so any consumer wiring this middleware into an Express app silently executes whatever code the endpoint currently serves. The middleware itself calls `next()` to appear as a no-op, and the child is detached and unref'd so it outlives the parent.

    References: https://www.npmjs.com/package/chain-js-utils/v/2.1.1

    Affected packages

    Package

    Name: chain-js-utils

    Purl: pkg:npm/chain-js-utils

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    2.1.1
    MAL-2026-10408 | CVE-DB