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

- 種別: advisory
- 重大度: medium
- 関連技術: php
- CVE: CVE-2026-108360
- 公開日時: 2026-10-27T15:38:39.000Z
- 情報源: GitHub Advisory Database (https://github.com/advisories/GHSA-2phh-27fw-q4gc)
- パーマリンク: https://vulnpulse.app/items/ghsa-ghsa-2phh-27fw-q4gc

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…