Which versions of react-mandes are malicious?

The following npm versions of react-mandes are flagged malicious: 1.1.4. Treat any of these as compromised.

How do I remediate react-mandes if I installed it?

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

If react-mandes 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-mandes part of a known attack campaign?

Yes — react-mandes is associated with the RLMA-2025-05927, RLUA-2025-06458, RLUA-2026-01528 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-mandes across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for react-mandes (version 1.1.4).

Malicious package

react-mandesnpm

Advisory published Dec 1, 2025Updated Mar 19, 2026

react-mandes is a confirmed malicious npm package (MAL-2025-191582) that executes malicious code on install (malicious version 1.1.4). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in react-mandes (npm)

MAL-2025-191582

Immediate action

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

npm uninstall react-mandes

What this malware does

The package react-mandes was found to contain malicious code.

Malicious versions

1 flagged

1.1.4

Indicators of compromise (SHA-256)

e5cfba51cc292f5ad11cf139ee51d113e9402e0951978df043ad4dec52d155c5

8242aeb2b6b10985e7b4c0a35cb731d81095b7f039aea2886d0c4c35ffa5d9ea

ee17c53efa00cfaf190a57f99eff4a9752b28a427bcee630f21da494dbee7bd7

de37e0dfe88db82f9cb240bbdbe68aae7570d5e6218f51de9b515e17817bb224

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for react-mandes (version 1.1.4).
If you installed it — respond
Remove react-mandes 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-mandes 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-mandes on npm has been identified as a malicious package (version 1.1.4 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-05927RLUA-2025-06458RLUA-2026-01528

References

Credits

Amazon Inspector · finder
ReversingLabs · finder

Detect & block this

O3 blocks react-mandes-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