Which versions of npm-builders are malicious?

Every published version of npm-builders on npm is considered malicious. Remove the package entirely.

How do I remediate npm-builders if I installed it?

Remove npm-builders 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 npm-builders — how do I know if it already compromised me?

If npm-builders 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.

Is npm-builders part of a known attack campaign?

Yes — npm-builders is associated with the GHSA-fjr5-82h6-f8gr campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find npm-builders across my projects, lockfiles, and CI pipelines?

Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for npm-builders (all published versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging npm-builders across your stack and pipelines.

Malicious package

npm-buildersnpm

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

MAL-2026-1345

Immediate action

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

npm uninstall npm-builders

What this malware does

The package npm-builders 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.

Malicious versions

all versions

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

Indicators of compromise (SHA-256)

83c8c91b9b31b2f06c283e24505777cd3486a18286a6eb6a2f2b29ca2e6462e6

3c63391276857464ec97afe878e9a323907ccb5cc79486e5d11ce3078f2621e1

Detection & response playbook

Malicious package

Find it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for npm-builders (all published versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging npm-builders across your stack and pipelines.
If you installed it — respond
Remove npm-builders 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 npm-builders 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.
How O3 protects you
O3 blocks npm-builders 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. npm-builders 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.

Campaign

GHSA-fjr5-82h6-f8gr

References

github.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks npm-builders-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