LWA-2026-6353 MAL-2026-10109 ↗ confirmed malware

validator-string@13.15.36

Malicious code in validator-string (npm)

T1195.002 · Compromise Software Supply ChainT1059.007 · JavaScript

Analysis

validator-string@13.15.36 is a combosquat of the legitimate validator package. It ships the real validator.js source code as camouflage but appends a heavily obfuscated JavaScript payload to index.js that executes on postinstall via the lifecycle hook. The obfuscated payload uses a Fisher-Yates shuffle-based string decoder and a large encoded blob that is decoded and executed at runtime. The package has no repository and no verifiable publisher identity.

analyzed by
Leitwacht
first seen
Jul 6, 2026, 07:46 PM
analyzed
Jul 6, 2026, 07:47 PM

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Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.