🛡️ MAL-2026-10406 — async-chain-dom

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Malicious code in async-chain-dom (npm)

Source: amazon-inspector

On require, index.js spawns a detached, unref'd node lib/vcall.js child process. lib/vcall.js fetches JavaScript from https://api.jsonsilo.com/public/df71fd55-4f0c-4326-9b5b-a285e38023a5, extracts the .model field from the response, and executes it via new Function.constructor("require", src) with require passed in, giving the remote endpoint arbitrary code execution inside the installer's Node process. The detached+unref pattern decouples the loader from the parent lifecycle so it persists after the consumer process exits, and a retry loop keeps the fetch running. The package masquerades as the pino logger (module.exports.pino = vCheck; keywords fast/logger/stream/json; lib files mimicking pino) despite the name async-chain-dom, providing a cover story for a developer to require it. The remote endpoint is a mutable jsonsilo.com blob under attacker control, so the executed payload can be swapped at any time.

Affected software

MAL-2026-10406 is recorded against 1 package.

  • async-chain-dom

Timeline and source

Published on 13 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

www.npmjs.com (Package)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-07-13
Updated 2026-08-12
Modified 2026-07-13
Fix URL N/A

Affected Packages

Software From version Fixed in
async-chain-dom — —

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