Which versions of jshelperdependenceny are malicious?

The following npm versions of jshelperdependenceny are flagged malicious: 99.0.0. Treat any of these as compromised.

How do I remediate jshelperdependenceny if I installed it?

jshelperdependenceny is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

I already installed jshelperdependenceny — how do I know if it already compromised me?

If jshelperdependenceny was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Is jshelperdependenceny part of a known attack campaign?

Yes — jshelperdependenceny is associated with the IN-MAL-2026-021708 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find jshelperdependenceny across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for jshelperdependenceny (version 99.0.0).

Malicious package

jshelperdependencenynpm

Advisory published Oct 25, 2026Updated Oct 25, 2026

jshelperdependenceny is a confirmed malicious npm package (MAL-2026-18288) that steals credentials and exfiltrates sensitive data (malicious version 99.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in jshelperdependenceny (npm)

MAL-2026-18288

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall jshelperdependenceny

What this malware does

npm package 'jshelperdependenceny' is published at version 99.0.0 with a preinstall banner stating it is intended to shadow an internal v1.0.0 package of the same name — the classic dependency-confusion shape of using an inflated version to win resolution against a private registry. On install, package.json runs 'node preinstall.js || true', which collects os.hostname(), os.platform(), os.arch(), and the package name/version and POSTs them as JSON to a URL taken from the DC_CALLBACK_URL environment variable, defaulting to http://127.0.0.1:5656/exfil. The env-var override turns the loopback default into a functional attacker-configurable beacon that fires automatically on npm install and discloses installer host identifiers plus confirmation that the shadowed internal name resolved to this public artifact.

Malicious versions

1 flagged

99.0.0

Indicators of compromise (SHA-256)

dc4d19697f4104351bb25b7e568018ec6ed85d626b7265fb4b9682ae12183be9

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for jshelperdependenceny (version 99.0.0).
If you installed it — respond
jshelperdependenceny is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If jshelperdependenceny was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. jshelperdependenceny on npm has been identified as a malicious package (version 99.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-021708

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks jshelperdependenceny-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database