MAL-2026-13760 Malicious code in bs58-13 (npm)

Package name, README, and keywords mirror the popular base58 encoding library bs58, but the main module contains only require("base65-13x") and re-exports its result. The declared runtime dependency base65-13x is a name-lookalike of the genuine base-x library that bs58 normally depends on. The wrapper itself declares no lifecycle scripts and performs no network I/O, filesystem access, or shell execution; installing this package resolves and loads base65-13x in place of base-x.

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.