PhpSpreadsheet: SSRF whitelist bypass via unre-validated HTTP redirect in Drawing::setPath external image loading

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

PhpSpreadsheet's Worksheet\Drawing::setPath() validates an external-image URL against an operator-supplied isWhitelisted callback once, on the initial URL only, then fetches it with file_get_contents() using a stream context that does not set follow_location => 0. A whitelisted host that returns an HTTP 302 Location: redirect to an internal target is therefore followed by PHP's HTTP wrapper (default follow_location=1, max_redirects=20) with no re-validation of the redirect hop — defeating the w…

GitHub Advisory Databaseで読む

2026/10/28 00:38、GitHub Advisory Databaseが「PhpSpreadsheet: SSRF whitelist bypass via unre-validated HTTP redirect in Drawing::setPath external image loading」を公開しました (種別: 脆弱性アドバイザリ)。重大度は「警告」(medium) です。関連する技術: PHP。CVE: CVE-2026-108360。