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Malicious package

cat-embed-i18n-resnpm

Advisory published Updated

cat-embed-i18n-res is a confirmed malicious npm package (MAL-2026-14471) that executes malicious code on install (malicious version 1.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in cat-embed-i18n-res (npm)

MAL-2026-14471
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall cat-embed-i18n-res

What this malware does

The package's only shipped content, strings.json, is presented as an i18n/translation resource bundle but its values are HTML/JavaScript XSS payloads rather than localized text. Multiple entries use <img src=x onerror=...> and <svg onload=...> handlers that invoke fetch() against the hardcoded endpoint https://notpismo.cloud/c, sending document.domain and document.cookie as query parameters. Any consumer application that renders these strings as HTML (the ordinary use of an i18n bundle in web UIs) will execute the injected script in the end-user's browser and transmit that user's session cookies and hosting domain to notpismo.cloud. The package name and framing as a translation resource are a cover for the payload; there is no legitimate localization content in the file.

Malicious versions

1 flagged
1.0.0

Indicators of compromise (SHA-256)

c612800e80bb36720e75741be9665ab6acbed58bcd5d51065fcedd1d990aaad0

Detection & response playbook

Malicious package

  1. Find it

    Search your lockfiles and build artifacts for cat-embed-i18n-res (version 1.0.0).

  2. If you installed it — respond

    Remove cat-embed-i18n-res 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.

  3. Did it already run?

    If cat-embed-i18n-res 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. cat-embed-i18n-res on npm has been identified as a malicious package (version 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-018685

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks cat-embed-i18n-res-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
cat-embed-i18n-res (npm) malicious package — MAL-2026-14471 | O3 Security