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Malicious package

ethereum-lintnpm

Malicious code in ethereum-lint (npm) Remove it immediately and rotate any exposed credentials.

MAL-2026-942
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall ethereum-lint

What this malware does

The package ethereum-lint 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.

The OpenSSF Package Analysis project identified 'ethereum-lint' @ 2.0.2 (npm) as malicious.

It is considered malicious because:

  • The package executes one or more commands associated with malicious behavior.

Malicious versions

1 flagged
2.0.2

Indicators of compromise (SHA-256)

17947b260e1c36e7d40692e3f0434e3e67de5e6c528eea0f7ceed838fa1a65cc
f139611e5bee8bd888911afc42c4e762ba55dc37cb142d92fe4203209f917600
d4db9b610771f0e6a14c8e5de6545323a4041420731492b2265b31ec14fdaa3b

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 ethereum-lint (version 2.0.2). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging ethereum-lint across your stack and pipelines.

  2. If you installed it — respond

    Remove ethereum-lint 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 ethereum-lint 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 ethereum-lint 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. ethereum-lint on npm has been identified as a malicious package (version 2.0.2 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GHSA-x56c-5jr9-m265

References

Credits

  • Amazon Inspector · finder
  • OpenSSF: Package Analysis · finder

Detect & block this

O3 blocks ethereum-lint-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.

ethereum-lint (npm) malicious package — MAL-2026-942 | O3 Security