Which versions of @0xlr/sentry-web are malicious?

The following npm versions of @0xlr/sentry-web are flagged malicious: 999.0.0. Treat any of these as compromised.

How do I remediate @0xlr/sentry-web if I installed it?

Remove @0xlr/sentry-web 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 @0xlr/sentry-web part of a known attack campaign?

Yes — @0xlr/sentry-web is associated with the IN-MAL-2026-004979, IN-MAL-2026-004980 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 @0xlr/sentry-web 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 @0xlr/sentry-web and packages like it before any post-install script runs.

Malicious package

@0xlr/sentry-webnpm

Malicious code in @0xlr/sentry-web (npm) Remove it immediately and rotate any exposed credentials.

MAL-2026-5387

Immediate action

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

npm uninstall @0xlr/sentry-web

What this malware does

On npm install, this package automatically executes postinstall.js, which enumerates the entire process.env (every environment variable, including CI secrets, AWS_*, NPM_TOKEN, and any other tokens present in the install environment) along with hostname, username, homedir, cwd, argv, platform, arch, and release. The collected payload is POSTed over HTTPS to rytxau88zxh61dw6qz4yn19naeg54vsk.oastify.com, a Burp Collaborator out-of-band subdomain used for exfiltration. The package's own description self-identifies as a placeholder squat for the sentry-web name, and it ships at version 999.0.0 — a squat-marker version. Installing this package on any machine where credentials are present in the environment results in those credentials being shipped off-host on a single npm install invocation.

Malicious versions

1 flagged

999.0.0

Indicators of compromise (SHA-256)

6cda998358d5cfe20dc0c060f7e212e44ee41e6f369f42c15badbfdd7b796744

70c4e5e40d85289a94afecdf9292683a40e5a3a85ed383e74cbcf8536a921f7a

Frequently asked questions

No. @0xlr/sentry-web 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

IN-MAL-2026-004979IN-MAL-2026-004980

References

npmjs.com

Credits

Amazon Inspector · finder

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