Malicious code in blue-string-formatter-utils (npm)
Exploitation and risk
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osv · MAL-2026-16273
Published--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (aa3c9f5edcc636fc8d38e40a6bb225aed8f6b638be31f2abf8b6e747212c9565) The package advertises itself as 'Utility helpers for string formatting' but its shipped main file performs a single behavior: an XMLHttpRequest GET to the protocol-relative URL //xss.report/c/k3rne111 whose response body is passed directly to eval(). Any require()/import of this package causes arbitrary attacker-controlled JavaScript from xss.report to execute in the consumer's Node process, with no pinning, no integrity check, and no relationship to the advertised functionality. The mismatch between the package's stated purpose (string utilities) and its actual contents (a remote-code loader) is a cover-story pattern.
- Source published
- 17 Sep 2026 23:19:27 UTC
- Source modified
- 18 Sep 2026 01:00:06 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.