Which versions of node-calculator-239a are malicious?

Every published version of node-calculator-239a on npm is considered malicious. Remove the package entirely.

How do I remediate node-calculator-239a if I installed it?

Remove node-calculator-239a 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-239a — how do I know if it already compromised me?

If node-calculator-239a 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-239a across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for node-calculator-239a (all published versions).

Malicious package

node-calculator-239anpm

Advisory published Nov 17, 2025Updated Nov 17, 2025

node-calculator-239a is a confirmed malicious npm package (MAL-2025-190529) that executes malicious code on install. Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in node-calculator-239a (npm)

MAL-2025-190529

Immediate action

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

npm uninstall node-calculator-239a

What this malware does

The package node-calculator-239a 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)

28a630a90e48953eca0fd20a0ee26cd295ee003fc3b816a028d1d56da8bc79d3

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for node-calculator-239a (all published versions).
If you installed it — respond
Remove node-calculator-239a 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-239a 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-239a 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-239a-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