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Malicious package

ac-featurenpm

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

MAL-2026-781
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall ac-feature

What this malware does

The package ac-feature was found to contain malicious code.

Malicious versions

1 flagged
99.9.9

Indicators of compromise (SHA-256)

d4336ebc941f06184c39e082b6d53167ba1466dad57a4a05936446980dd4759b
d2d58399bf9d268e0668bec316122d1c03a653db2acd669b3f4e9e910e11d0b1

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 ac-feature (version 99.9.9). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging ac-feature across your stack and pipelines.

  2. If you installed it — respond

    Remove ac-feature 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 ac-feature 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 ac-feature 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. ac-feature on npm has been identified as a malicious package (version 99.9.9 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-01091

Credits

  • Amazon Inspector · finder
  • ReversingLabs · finder

Detect & block this

O3 blocks ac-feature-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.

ac-feature (npm) malicious package — MAL-2026-781 | O3 Security