Language: JavaScript
Label: safe
CWE: CWE-331 \u2014 Insufficient Entropy
The product uses an algorithm or scheme that produces insufficient entropy, leaving patterns or clusters of values that are more likely to occur than others.

Code:
        WebCryptography.prototype.decryptArrayBuffer = function (key, ciphertext) {
            return __awaiter(this, void 0, void 0, function () {
                var abIv, data;
                return __generator(this, function (_a) {
                    switch (_a.label) {
                        case 0:
                            abIv = ciphertext.slice(0, 16);
                            if (ciphertext.slice(WebCryptography.IV_LENGTH).byteLength <= 0)
                                throw new Error('decryption error: empty content');
                            return [4 /*yield*/, crypto.subtle.decrypt({ name: 'AES-CBC', iv: abIv }, key, ciphertext.slice(WebCryptography.IV_LENGTH))];
                        case 1:
                            data = _a.sent();
                            return [2 /*return*/, data];
                    }
                });
            });
        };