Which versions of node-calculator-c3ef are malicious?

Every published version of node-calculator-c3ef on npm is considered malicious. Remove the package entirely.

How do I remediate node-calculator-c3ef if I installed it?

Remove node-calculator-c3ef 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 node-calculator-c3ef — how do I know if it already compromised me?

If node-calculator-c3ef 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.

How do I find node-calculator-c3ef across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for node-calculator-c3ef (all published versions).

Malicious package

node-calculator-c3efnpm

Advisory published Nov 17, 2025Updated Nov 17, 2025

node-calculator-c3ef is a confirmed malicious npm package (MAL-2025-190540) that executes malicious code on install. Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in node-calculator-c3ef (npm)

MAL-2025-190540

Immediate action

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

npm uninstall node-calculator-c3ef

What this malware does

The package node-calculator-c3ef was found to contain malicious code.

Malicious versions

all versions

Every published version of this package is considered malicious — remove it entirely.

Indicators of compromise (SHA-256)

73ec8a1373e5c6acdb6356064e038505a699c6f8c4b377726514e5fc7ccd2335

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for node-calculator-c3ef (all published versions).
If you installed it — respond
Remove node-calculator-c3ef 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 node-calculator-c3ef 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. node-calculator-c3ef on npm has been identified as a malicious package (all published versions flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks node-calculator-c3ef-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