PhpSpreadsheet ODS Reader: Unbounded number-rows-repeated → CPU & Memory Exhaustion (DoS)

影響: composer:phpoffice/phpspreadsheet >= 4.0.0, <= 5.9.0 → 5.10.0, composer:phpoffice/phpspreadsheet >= 3.3.0, <= 3.10.7 → 3.10.8, composer:phpoffice/phpspreadsheet >= 2.2.0, <= 2.4.7 → 2.4.8, composer:phpoffice/phpspreadsheet >= 2.0.0, <= 2.1.18 → 2.1.19, composer:phpoffice/phpspreadsheet <= 1.30.6 → 1.30.7

When PhpSpreadsheet loads an OpenDocument Spreadsheet (.ods), Ods::processTableRow() reads the table:number-rows-repeated attribute of a with an unchecked (int) cast, then materialises one cell per repeated row. This value is completely unbounded, so a single ~1.4 KB file can instruct the reader to create up to millions of cells, exhausting memory (fatal OOM). No authentication, no special configuration, and the default read filter are required - any application that loads a user-supplied .ods…

GitHub Advisory Databaseで読む

2026/10/28 00:38、GitHub Advisory Databaseが「PhpSpreadsheet ODS Reader: Unbounded number-rows-repeated → CPU & Memory Exhaustion (DoS)」を公開しました (種別: 脆弱性アドバイザリ)。重大度は「重要」(high) です。関連する技術: PHP。CVE: CVE-2026-108359。