🛡️ MAL-2026-10408 — chain-js-utils

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

Description

Malicious code in chain-js-utils (npm)

Source: amazon-inspector

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.

Affected software

MAL-2026-10408 is recorded against 1 package.

  • chain-js-utils

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
chain-js-utils — —

Free Vulnerability Check

Is your site affected by MAL-2026-10408?

BotEraser helps you identify potentially vulnerable plugins and themes by checking your installation against MAL-2026-10408 and other known CVE records.

Scan My Site Free →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.