Which versions of chai-types are malicious?

The following npm versions of chai-types are flagged malicious: 1.1.7. Treat any of these as compromised.

How do I remediate chai-types if I installed it?

Remove chai-types 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 chai-types — how do I know if it already compromised me?

If chai-types 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 chai-types part of a known attack campaign?

Yes — chai-types is associated with the RLMA-2026-01198 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 chai-types across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for chai-types (version 1.1.7).

Malicious package

chai-typesnpm

Advisory published Mar 18, 2026Updated Mar 23, 2026

chai-types is a confirmed malicious npm package (MAL-2026-1685) that executes malicious code on install (malicious version 1.1.7). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in chai-types (npm)

MAL-2026-1685

Immediate action

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

npm uninstall chai-types

What this malware does

The package chai-types was found to contain malicious code.

Malicious versions

1 flagged

1.1.7

Indicators of compromise (SHA-256)

313058c0cb725a352d048cb510fdc901d03c960d70e6cb91e291b4de1c65e36a

75b0056e3a13b9c7f97a77ee8351068a9d1a900c5cabd5f42011b31cedf0fd13

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for chai-types (version 1.1.7).
If you installed it — respond
Remove chai-types 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 chai-types 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. chai-types on npm has been identified as a malicious package (version 1.1.7 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-01198

Credits

Amazon Inspector · finder
ReversingLabs · finder

Detect & block this

O3 blocks chai-types-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