CVE-2026-108358

The PhpSpreadsheet library (prior to versions 1.30.7, 2.1.19, 2.4.8, 3.10.8, and 5.10.0) contains a vulnerability in XmlScanner::scan within src/PhpSpreadsheet/Reader/Security/XmlScanner.php. The scanner's DOCTYPE detection pattern fails to account for ISO-2022 escape sequences in XLSX XML parts....

CVE-2026-108358 PhpSpreadsheet: XmlScanner Bypass via ISO-2022 Escape Sequences Allows XXE and Denial of Service

PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. Prior to 1.30.7, 2.1.19, 2.4.8, 3.10.8, and 5.10.0, XmlScanner::scan in src/PhpSpreadsheet/Reader/Security/XmlScanner.php uses a DOCTYPE detection pattern that accounts for NUL-byte interleaving but not ISO-2022 escap...