Which versions of form-classifier are malicious?

The following npm versions of form-classifier are flagged malicious: 82.3.8. Treat any of these as compromised.

How do I remediate form-classifier if I installed it?

Remove form-classifier 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 form-classifier — how do I know if it already compromised me?

If form-classifier 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.

Is form-classifier part of a known attack campaign?

Yes — form-classifier is associated with the RLMA-2025-06355 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 form-classifier across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for form-classifier (version 82.3.8).

Malicious package

form-classifiernpm

Advisory published Nov 13, 2025Updated Dec 24, 2025

form-classifier is a confirmed malicious npm package (MAL-2025-190491) that executes malicious code on install (malicious version 82.3.8). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in form-classifier (npm)

MAL-2025-190491

Immediate action

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

npm uninstall form-classifier

What this malware does

The package form-classifier was found to contain malicious code.

Malicious versions

1 flagged

82.3.8

Indicators of compromise (SHA-256)

aee6a6945bad04a1ec3fbe89e2cbe5013625ba025601a3df6678a125761d3b55

60c6b4488143f1463aa5241b322371a9d5cfb24572b82a2a0d4a626674a52570

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for form-classifier (version 82.3.8).
If you installed it — respond
Remove form-classifier 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 form-classifier 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. form-classifier on npm has been identified as a malicious package (version 82.3.8 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-06355

Credits

Amazon Inspector · finder
ReversingLabs · finder

Detect & block this

O3 blocks form-classifier-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