The npm package 'fca-raihan' versions 37.2.5 and 37.2.6 declare a dependency on themselves via an off-registry GitHub source without a pinned reference or integrity check. This allows the repository owner to change the installed code at any time, potentially introducing malicious code during installation. The package includes base64 decoding and references consistent with its advertised messaging and end-to-end encryption functionality, but these are not independently verifiable without examining the mutable GitHub source at install time.