Which versions of abcxyzz are malicious?

The following npm versions of abcxyzz are flagged malicious: 9.9.9. Treat any of these as compromised.

How do I remediate abcxyzz if I installed it?

Remove abcxyzz from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

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

If abcxyzz 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.

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

Search your lockfiles and build artifacts for abcxyzz (version 9.9.9).

Malicious package

abcxyzznpm

Advisory published Feb 18, 2026Updated Mar 23, 2026

abcxyzz is a confirmed malicious npm package (MAL-2026-940) that executes malicious code on install (malicious version 9.9.9). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in abcxyzz (npm)

MAL-2026-940

Immediate action

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

npm uninstall abcxyzz

What this malware does

The package abcxyzz was found to contain malicious code.

The OpenSSF Package Analysis project identified 'abcxyzz' @ 9.9.9 (npm) as malicious.

It is considered malicious because:

The package executes one or more commands associated with malicious behavior.

Malicious versions

1 flagged

9.9.9

Indicators of compromise (SHA-256)

b22a45e3a267d5930d5e8dfdb52954bf049c7b63a9bdb0818e5daff1191e7423

8b953a8183a1a7ba906c9117e8afe658b2606311b606d8b3ecad680076fc51e9

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for abcxyzz (version 9.9.9).
If you installed it — respond
Remove abcxyzz from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If abcxyzz 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. abcxyzz on npm has been identified as a malicious package (version 9.9.9 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Credits

Amazon Inspector · finder
OpenSSF: Package Analysis · finder

Detect & block this

O3 blocks abcxyzz-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database