Malicious code in blue-string-formatter-utilss (npm)
Exploitation and risk
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osv · MAL-2026-16363
Published--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (de9e55c734c18f91b4b3a043dd6539097aa4e57056ff9dca6df1a9d3a3631c25) The package advertises itself as string-formatting utilities but ships no formatter code. Its main entry `payload.js` is an IIFE that creates a `<script>` element with `src='https://xss.report/c/k3rne111'` and appends it to `document.body`, causing an attacker-controlled remote script to be fetched and executed whenever the module is loaded in a DOM context. xss.report is a known XSS payload-delivery service. The name-versus-behavior mismatch (a 'string formatter' whose only behavior is a remote script loader) is a typosquat cover story rather than legitimate functionality.
- Source published
- 21 Sep 2026 19:48:44 UTC
- Source modified
- 21 Sep 2026 20:30:13 UTC
- Saved here
- 24 Oct 2026 13:17:17 UTC
- Source terms
- OSV · upstream source license applies
Original source record · Cite this exact observation · Complete original publisher JSON
Source: osv · OSV · upstream source license applies. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.