GHSA-7C6M-4442-2X6M PhpSpreadsheet has CPU Denial of Service via Unbounded Row Number in XLSX Row Dimensions

Summary The XLSX reader's ColumnAndRowAttributes::readRowAttributes method reads row numbers from XML attributes without validating them against the spreadsheet maximum row limit AddressRange::MAXROW = 1,048,576. An attacker can craft a minimal XLSX file 1.6KB containing a element that inflates...