{"action":"Upgrade phpoffice/phpspreadsheet to 1.30.3 or later.","affected":[{"fixed":"5.6.0","introduced":"4.0.0"},{"fixed":"3.10.4","introduced":"3.3.0"},{"fixed":"2.4.4","introduced":"2.2.0"},{"fixed":"2.1.15","introduced":"2.0.0"},{"fixed":"1.30.3","introduced":"0"}],"component":"phpoffice/phpspreadsheet","cve_ids":["CVE-2026-34084"],"ecosystem":"Packagist","epss":0.00712,"exploited":false,"fixed_versions":["5.6.0","3.10.4","2.4.4","2.1.15","1.30.3"],"ghsa_id":"GHSA-q4q6-r8wh-5cgh","id":"tcs_01M5KF6XT4DXJHNQFDGT0GBSN3","modified_at":"2026-05-08T15:33:49.124719Z","published_at":"2026-04-29T20:22:30Z","references":["https://osv.dev/vulnerability/GHSA-q4q6-r8wh-5cgh","https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-q4q6-r8wh-5cgh","https://nvd.nist.gov/vuln/detail/CVE-2026-34084","https://github.com/PHPOffice/PhpSpreadsheet","https://www.php.net/manual/en/wrappers.php"],"severity":{"label":"critical"},"sources":[{"source":"osv","source_id":"GHSA-q4q6-r8wh-5cgh","url":"https://osv.dev/vulnerability/GHSA-q4q6-r8wh-5cgh"}],"summary":"PhpSpreadsheet has SSRF/RCE in IOFactory::load when $filename is user controlled"}