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Malicious package

@cewe-onsitesearch/schemasnpm

Malicious code in @cewe-onsitesearch/schemas (npm) Remove it immediately and rotate any exposed credentials.

MAL-2026-1594
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall @cewe-onsitesearch/schemas

What this malware does

The package @cewe-onsitesearch/schemas was found to contain malicious code.

Malicious versions

4 flagged
99.0.099.0.199.0.2100.0.0

Indicators of compromise (SHA-256)

44c5946896f15654438101054ab3f474cc7e23251257f2040625a1e767446852
87d9258073c15dc95665b0db06fe9232d5f222fd239a31030c5be5cc732927b9

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 @cewe-onsitesearch/schemas (4 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging @cewe-onsitesearch/schemas across your stack and pipelines.

  2. If you installed it — respond

    Remove @cewe-onsitesearch/schemas 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 @cewe-onsitesearch/schemas 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 @cewe-onsitesearch/schemas 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. @cewe-onsitesearch/schemas on npm has been identified as a malicious package (versions 99.0.0, 99.0.1, 99.0.2, 100.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-00976

Credits

  • Amazon Inspector · finder
  • ReversingLabs · finder

Detect & block this

O3 blocks @cewe-onsitesearch/schemas-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.

@cewe-onsitesearch/schemas (npm) malicious package — MAL-2026-1594 | O3 Security