Which versions of fe-prop-types are malicious?

The following npm versions of fe-prop-types are flagged malicious: 99.99.9, 99.99.99, 999.999.999. Treat any of these as compromised.

How do I remediate fe-prop-types if I installed it?

Remove fe-prop-types 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 fe-prop-types — how do I know if it already compromised me?

If fe-prop-types 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 fe-prop-types part of a known attack campaign?

Yes — fe-prop-types is associated with the RLMA-2026-01317 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 fe-prop-types across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for fe-prop-types (3 malicious versions).

Malicious package

fe-prop-typesnpm

Advisory published Mar 18, 2026Updated Mar 23, 2026

fe-prop-types is a confirmed malicious npm package (MAL-2026-1738) that executes malicious code on install (malicious versions 99.99.9, 99.99.99, 999.999.999). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in fe-prop-types (npm)

MAL-2026-1738

Immediate action

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

npm uninstall fe-prop-types

What this malware does

The package fe-prop-types was found to contain malicious code.

Malicious versions

3 flagged

99.99.999.99.99999.999.999

Indicators of compromise (SHA-256)

eae741b89c1948e50881415382997e2a39635614f619ac84af965f9c422abe29

4f5d75cb77478264c2b3060e9642f0f1a487b72691c46a253489c128f6926444

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for fe-prop-types (3 malicious versions).
If you installed it — respond
Remove fe-prop-types 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 fe-prop-types 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. fe-prop-types on npm has been identified as a malicious package (versions 99.99.9, 99.99.99, 999.999.999 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-01317

Credits

Amazon Inspector · finder
ReversingLabs · finder

Detect & block this

O3 blocks fe-prop-types-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

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