Which versions of fmt-helpers-794b are malicious?

The following npm versions of fmt-helpers-794b are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate fmt-helpers-794b if I installed it?

Remove fmt-helpers-794b 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 network activity or persistence. Use O3 Security's dependency scanner to confirm the package and its artifacts are fully purged across your stack.

Is fmt-helpers-794b part of a known attack campaign?

Yes — fmt-helpers-794b is associated with the IN-MAL-2026-006962, GHSA-4wmf-8x9r-34cc campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

Can O3 Security detect fmt-helpers-794b in my codebase?

Yes. O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, blocking fmt-helpers-794b and packages like it before any post-install script runs.

Malicious package

fmt-helpers-794bnpm

Malicious code in fmt-helpers-794b (npm) Remove it immediately and rotate any exposed credentials.

MAL-2026-6092

Immediate action

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

npm uninstall fmt-helpers-794b

What this malware does

Package declares a postinstall lifecycle hook ("postinstall": "node run.js" in package.json) that runs run.js automatically on npm install. run.js imports os, fs, http, https, and child_process and reads host identification fields (os.hostname(), os.platform()), performs filesystem reads (fs.readFileSync, fs.existsSync), and issues multiple outbound POST calls (run.js lines 131, 134, 345, 352). The combination of automatic install-time execution, host/filesystem reconnaissance, and outbound HTTP POSTs is the canonical install-time exfiltration shape with no legitimate library purpose presented in the package. Installing this package causes immediate execution of code that collects installer host data and ships it off-host.

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

1 flagged

1.0.0

Indicators of compromise (SHA-256)

19b05306978ff506805f118049f81c74c5da1503bb34fd14a2a57d4e6faac52c

3aca1041e88b5f01d4d06b372aebdd36015952d30d7ea18f9dc9c7a7f33df351

Frequently asked questions

No. fmt-helpers-794b on npm has been identified as a malicious package (version 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-006962GHSA-4wmf-8x9r-34cc

References

Credits

Amazon Inspector · finder

Scan your dependencies

O3 Security blocks malicious packages like this at install time and in CI.

Supply-chain protection