Which versions of tw-webkit-universal are malicious?

The following npm versions of tw-webkit-universal are flagged malicious: 99.0.0. Treat any of these as compromised.

How do I remediate tw-webkit-universal if I installed it?

Remove tw-webkit-universal 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 tw-webkit-universal — how do I know if it already compromised me?

If tw-webkit-universal 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 tw-webkit-universal part of a known attack campaign?

Yes — tw-webkit-universal is associated with the GHSA-w7cj-94c9-vxwj, RLMA-2025-05535, RLUA-2025-05972 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 tw-webkit-universal across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for tw-webkit-universal (version 99.0.0).

Malicious package

tw-webkit-universalnpm

Advisory published Oct 10, 2025Updated Dec 2, 2025

tw-webkit-universal is a confirmed malicious npm package (MAL-2025-48288) that executes malicious code on install (malicious version 99.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in tw-webkit-universal (npm)

MAL-2025-48288

Immediate action

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

npm uninstall tw-webkit-universal

What this malware does

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.

Malicious versions

1 flagged

99.0.0

Indicators of compromise (SHA-256)

7fbf2c831086ca3205f21c4113b6b26c6a3a854dcf9b56b72683b10995a7fe43

00fa734c7dcae07d8ab3313b2dd7d2707e449d9f0bacecc501843e6b13d574f0

e12d7c73479092ab9c013277dddbf7d08ed0e0f171a9a441e85f0c507c8bf33a

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for tw-webkit-universal (version 99.0.0).
If you installed it — respond
Remove tw-webkit-universal 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 tw-webkit-universal 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. tw-webkit-universal 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

GHSA-w7cj-94c9-vxwjRLMA-2025-05535RLUA-2025-05972

References

Credits

Amazon Inspector · finder
ReversingLabs · finder

Detect & block this

O3 blocks tw-webkit-universal-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