Which versions of react-error-lint are malicious?

The following npm versions of react-error-lint are flagged malicious: 1.1.6. Treat any of these as compromised.

How do I remediate react-error-lint if I installed it?

Remove react-error-lint 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 network activity or persistence. Use O3 Security's dependency scanner to confirm the package and its artifacts are fully purged across your stack.

Is react-error-lint part of a known attack campaign?

Yes — react-error-lint is associated with the IN-MAL-2026-007012 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

Can O3 Security detect react-error-lint in my codebase?

Yes. O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, blocking react-error-lint and packages like it before any post-install script runs.

Malicious package

react-error-lintnpm

Malicious code in react-error-lint (npm) Remove it immediately and rotate any exposed credentials.

MAL-2026-6137

Immediate action

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

npm uninstall react-error-lint

What this malware does

Package name and README impersonate the popular react-error-boundary library (advertising an ErrorBoundary export, citing bvaughn and kentcdodds.com), but index.js exports unrelated helpers setDefaultModule and buildoptimize. The buildoptimize function issues an HTTP request to the hardcoded URL https://vercel-node-rouge-beta.vercel.app/icons/23 and passes the response body to eval(JSON.parse(b)) with no integrity check. Any caller that invokes buildoptimize() runs whatever JavaScript the attacker-controlled Vercel preview endpoint returns at that moment, granting remote code execution on the installer's machine. The advertised ErrorBoundary API does not exist, confirming the package is a lure rather than a misnamed legitimate library.

Malicious versions

1 flagged

1.1.6

Indicators of compromise (SHA-256)

a084c9e71eac856bf1a1fec025773cc561f9f6677c187d60e055b89c73d846b9

Frequently asked questions

No. react-error-lint on npm has been identified as a malicious package (version 1.1.6 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-007012

References

npmjs.com

Credits

Amazon Inspector · finder

Scan your dependencies

O3 Security blocks malicious packages like this at install time and in CI.

Supply-chain protection