Which versions of react-router-on-navigation are malicious?

The following npm versions of react-router-on-navigation are flagged malicious: 999.0.0. Treat any of these as compromised.

How do I remediate react-router-on-navigation if I installed it?

Remove react-router-on-navigation 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-router-on-navigation — how do I know if it already compromised me?

If react-router-on-navigation 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-router-on-navigation part of a known attack campaign?

Yes — react-router-on-navigation is associated with the RLMA-2026-01536 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-router-on-navigation across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for react-router-on-navigation (version 999.0.0).

Malicious package

react-router-on-navigationnpm

Advisory published Mar 18, 2026Updated Mar 23, 2026

react-router-on-navigation is a confirmed malicious npm package (MAL-2026-1838) that executes malicious code on install (malicious version 999.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in react-router-on-navigation (npm)

MAL-2026-1838

Immediate action

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

npm uninstall react-router-on-navigation

What this malware does

The package react-router-on-navigation was found to contain malicious code.

Malicious versions

1 flagged

999.0.0

Indicators of compromise (SHA-256)

aa9682b8528bcb905f1bd5399ed87481d10bda927833f4f48955a3d7ca45d6ae

51cdeb16aaf568ca4d20ada611c1d6ac957f95f244c9f86b0bfcc64bf76253d4

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for react-router-on-navigation (version 999.0.0).
If you installed it — respond
Remove react-router-on-navigation 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-router-on-navigation 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-router-on-navigation on npm has been identified as a malicious package (version 999.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-01536

Credits

Amazon Inspector · finder
ReversingLabs · finder

Detect & block this

O3 blocks react-router-on-navigation-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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