Which versions of corsair-module are malicious?

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

How do I remediate corsair-module if I installed it?

Remove corsair-module 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 corsair-module — how do I know if it already compromised me?

If corsair-module 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 corsair-module part of a known attack campaign?

Yes — corsair-module is associated with the RLMA-2026-01733 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 corsair-module across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for corsair-module (version 99.0.0).

Malicious package

corsair-modulenpm

Advisory published Mar 24, 2026Updated Apr 7, 2026

corsair-module is a confirmed malicious npm package (MAL-2026-2346) 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 corsair-module (npm)

MAL-2026-2346

Immediate action

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

npm uninstall corsair-module

What this malware does

The package corsair-module was found to contain malicious code.

Malicious versions

1 flagged

99.0.0

Indicators of compromise (SHA-256)

556753997ae73f9646246e5d4254846d50d4e40a6f4fd5a730c71e7f479e66f0

0c21d47c9d59d6abd121ee300ec8e6981d0fc22576fb01ca69c06633e5e46626

Detection & response playbook

Malicious package

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

RLMA-2026-01733

Credits

Amazon Inspector · finder
ReversingLabs · finder

Detect & block this

O3 blocks corsair-module-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