Which versions of ac-dom-styles are malicious?

The following npm versions of ac-dom-styles are flagged malicious: 99.9.9. Treat any of these as compromised.

How do I remediate ac-dom-styles if I installed it?

Remove ac-dom-styles 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 ac-dom-styles — how do I know if it already compromised me?

If ac-dom-styles 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 ac-dom-styles part of a known attack campaign?

Yes — ac-dom-styles is associated with the RLMA-2026-01089 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 ac-dom-styles across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for ac-dom-styles (version 99.9.9).

Malicious package

ac-dom-stylesnpm

Advisory published Feb 6, 2026Updated Mar 19, 2026

ac-dom-styles is a confirmed malicious npm package (MAL-2026-779) that executes malicious code on install (malicious version 99.9.9). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in ac-dom-styles (npm)

MAL-2026-779

Immediate action

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

npm uninstall ac-dom-styles

What this malware does

The package ac-dom-styles was found to contain malicious code.

Malicious versions

1 flagged

99.9.9

Indicators of compromise (SHA-256)

6e39cbc9f0e4b0b813dacd1b2dbe7211e456f56b12dc39033aaa4f20064b90e7

7a35343ed2bd5d18285c85a68e7e65b6b4778d45d37d04b1cb00f234fe305737

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for ac-dom-styles (version 99.9.9).
If you installed it — respond
Remove ac-dom-styles 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 ac-dom-styles 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. ac-dom-styles on npm has been identified as a malicious package (version 99.9.9 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-01089

Credits

Amazon Inspector · finder
ReversingLabs · finder

Detect & block this

O3 blocks ac-dom-styles-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