MalwarePublished 9 Jul 2026Updated 13 Jul 2026

es6-codify (npm) · Malicious Code

Affects es6-codifySource GCVE Database

Malicious package : remove es6-codify and rotate any secrets on hosts that installed it.

Data as of 13 Jul 2026, 09:19 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-10062

What to do

Remove es6-codify from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.

Affected software

Product	Affected	Fixed in
npmes6-codify	Affected 1.0.1 – 2.2.0 8 affected builds	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (e7ae2aa828c8ed2c3ec71480536fd07d9c19f3c698c3b095eafb41206ff3a75f) The package advertises itself as a small ES6 string/array/object utility library, but both entrypoints (dist/index.cjs and the ESM build) execute a top-level call on require/import that opens an HTTPS POST to the hardcoded host j5dcw95v-3000.inc1.devtunnels.ms at path /post-d. The request body is a JSON blob containing the full process.env of the importing process, together with process.cwd(), process.version, and process.argv. Any environment variable held by the installer at the moment this package is loaded (CI secrets, cloud credentials, tokens, database URLs) is transmitted to the attacker-controlled Microsoft dev-tunnel host. The exfiltration fires unconditionally on module load and is duplicated across the CJS and ESM entrypoints so it triggers regardless of how the package is resolved. There is no network functionality in the advertised API, so the network I/O has no benign explanation. ## Source: ghsa-malware (b254a2963094593aae850663d576f1cd6126f45cb4b217b05c373461dc05e7c0) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Impact

Sensitive environment variables and runtime information are leaked to an attacker-controlled server whenever the package is loaded. This can lead to compromise of secrets such as cloud credentials, tokens, and database URLs, potentially enabling further attacks on the victim's infrastructure or data.

Defensive guidance

Users should immediately remove and replace the es6-codify package from their projects. Avoid using this package and audit dependencies for malicious code. Monitor for any unauthorized access using leaked credentials.

Summary

The es6-codify package, advertised as a small ES6 utility library, includes malicious code in its entrypoints (dist/index.cjs and the ESM build) that performs an HTTPS POST request to a hardcoded attacker-controlled host. This request transmits a JSON payload containing the full process environment variables, current working directory, Node.js version, and command-line arguments. The exfiltration triggers immediately upon module import or require, regardless of the module system used. There is no legitimate network functionality in the package, confirming the network activity is unauthorized data exfiltration.

References

Community reviews

Loading reviews…

What to do

Affected software

Description

AI analysisMachine-generated, updated 10 Jul 2026, 10:11 UTC

Technical details

References

Community reviews