Which versions of react-fast-utilsa are malicious?

The following npm versions of react-fast-utilsa are flagged malicious: 2.0.1, 2.0.2, 2.0.3, 2.0.4. Treat any of these as compromised.

How do I remediate react-fast-utilsa if I installed it?

Remove react-fast-utilsa 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 react-fast-utilsa — how do I know if it already compromised me?

If react-fast-utilsa 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 react-fast-utilsa part of a known attack campaign?

Yes — react-fast-utilsa is associated with the RLMA-2026-01526, RLUA-2026-02030 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 react-fast-utilsa across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for react-fast-utilsa (4 malicious versions).

Malicious package

react-fast-utilsanpm

Advisory published Mar 18, 2026Updated Apr 16, 2026

react-fast-utilsa is a confirmed malicious npm package (MAL-2026-1835) that executes malicious code on install (malicious versions 2.0.1, 2.0.2, 2.0.3…). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in react-fast-utilsa (npm)

MAL-2026-1835

Immediate action

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

npm uninstall react-fast-utilsa

What this malware does

The package react-fast-utilsa was found to contain malicious code.

Malicious versions

4 flagged

2.0.12.0.22.0.32.0.4

Indicators of compromise (SHA-256)

4d493048e938e6765e2ae2cdc643c7413742bf6006f3388b5bdd3104c9c8160f

95853c89c144cd1630b70c6d2c5e97e8b3cafd6d8ff628b357c80d6a7f8407b5

aa93ee4b399182ca2017f9f8d9a6bde4b6e4d469eac39dcf1dcf08cde6838f0c

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for react-fast-utilsa (4 malicious versions).
If you installed it — respond
Remove react-fast-utilsa 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 react-fast-utilsa 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. react-fast-utilsa on npm has been identified as a malicious package (versions 2.0.1, 2.0.2, 2.0.3, 2.0.4 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-01526RLUA-2026-02030

References

reversinglabs.com

Credits

Amazon Inspector · finder
ReversingLabs · finder

Detect & block this

O3 blocks react-fast-utilsa-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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