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Fix: Vulnerability CVE-2026-31808 Fix file-type #18

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Fix: Vulnerability CVE-2026-31808 Fix file-type #18

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10 changes: 5 additions & 5 deletions fileValidator/index.js
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@

const readChunk = require('read-chunk');
const fileType = require('file-type');
const { fileTypeFromBuffer, reasonableDetectionSizeInBytes } = require('file-type');
const textFormat = ['csv', 'txt', 'html', 'htm', 'css', 'ini', 'json', 'tsv', 'xml', 'yaml', 'yml', 'rst', 'md'];

function toArrayBuffer(buf, length) {
Expand Down Expand Up @@ -43,20 +43,20 @@ function validateOldMSOffice(options) {
return hex == 'D0CF11E0A1B11AE1';
}

function vatidateFile(options, ext) {
async function vatidateFile(options, ext) {
if (textFormat.indexOf(ext) > -1) return true; //validateTextFormat(options);
if (['doc', 'xls', 'ppt', 'msg'].indexOf(ext) > -1) return validateOldMSOffice(options);
let buffer = options.type == 'Binary' ? readChunk.sync(options.path, 0, fileType.minimumBytes) : toArrayBuffer(options.data, fileType.minimumBytes);
let buffer = options.type == 'Binary' ? readChunk.sync(options.path, 0, reasonableDetectionSizeInBytes) : toArrayBuffer(options.data, reasonableDetectionSizeInBytes);
//remove BOM encoding
if (ext == 'xml') {
let hex = options.type == 'Binary' ? getHex(readChunk.sync(options.path, 0, 3), 3) : getHex(options.data, 3);
if (hex == 'EFBBBF')
buffer = buffer.slice(3);
}
let fileTypeObj = fileType(buffer);
let fileTypeObj = await fileTypeFromBuffer(buffer);
if (!fileTypeObj) return false;
if ((fileTypeObj.ext == 'jpg' || fileTypeObj.ext == 'jpeg') && (ext == 'jpg' || ext == 'jpeg')) return true;
return fileTypeObj.ext == ext;
}

module.exports = vatidateFile;
module.exports = vatidateFile;