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Malicious package

chai-as-addednpm

Malicious code in chai-as-added (npm) Remove it immediately and rotate any exposed credentials.

MAL-2026-2249
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall chai-as-added

What this malware does

The package chai-as-added was found to contain malicious code.

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
1.2.9

Indicators of compromise (SHA-256)

8d5056d792b6ced90bb9fe5c9ebd1726cc6bd61554739bb67c933cf4f7f50840
121a09e21b10c98f705a02343e235a9800c57b33a81abf364a47c3af69b6ceb4
abaa0c86e76614649fc79068697adcd59a12830e65c73345498d1ecd92313ed2

Detection & response playbook

Malicious package
  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for chai-as-added (version 1.2.9). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging chai-as-added across your stack and pipelines.

  2. If you installed it — respond

    Remove chai-as-added 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.

  3. Did it already run?

    If chai-as-added was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

  4. How O3 protects you

    O3 blocks chai-as-added before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. chai-as-added on npm has been identified as a malicious package (version 1.2.9 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GHSA-6r6x-95fj-pw48RLMA-2026-01909

References

Credits

  • Amazon Inspector · finder
  • ReversingLabs · finder

Detect & block this

O3 blocks chai-as-added-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.

chai-as-added (npm) malicious package — MAL-2026-2249 | O3 Security