MAL-2026-17458

Dashboard / Malicious Package / MAL-2026-17458

MAL-2026-17458

Summary: Malicious code in translate-base-font (npm)

Details: Source: amazon-inspector (3b0c647653ce1698d15162d24ea22d9b060d770daf28277f3ce27a0040dda6dc) The package presents itself as a CSS custom-property polyfill for font translation, but its actual behavior is a browser-side code-smuggling vector. payload.css ships ten `--base-color-1`..`--base-color-10` custom properties whose values are hex-byte triplets; the file carries the literal marker `Payload for vantamods.online` and a `__DOMAIN__` placeholder (hex `5f5f444f4d41494e5f5f`). At runtime, translate.js reads those CSS variables from the DOM, concatenates the hex bytes into a string, substitutes `__DOMAIN__` with the hex-decoded host `vantamods.online` (sourced from `--primary-brand-color`), and executes the resulting JavaScript with `new ("").constructor.constructor(fromCharCode.apply(null, _b))()` — i.e. a `Function` constructor invocation on attacker-controlled bytes. A hostname guard prevents execution on `vantamods.online`, `localhost`, and empty hostnames, so the smuggled code runs only on third-party sites that bundle or CDN-load this package. The advertised polyfill functionality is a cover story: any site shipping this dependency executes arbitrary JavaScript controlled by the maintainer of `vantamods.online` against every visitor, enabling session theft, credential capture, redirection, or arbitrary DOM manipulation in the site's origin. Source: ghsa-malware (d0ae1970321abd04ddd957d3135ee1d2eb64acee031428fa8f3cbcb8c48504b0) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

References: https://github.com/advisories/GHSA-grv5-7wp6-vw6h, https://www.npmjs.com/package/translate-base-font/v/1.4.2