{"action":"Upgrade phpoffice/phpspreadsheet to 1.30.4 or later.","affected":[{"fixed":"5.7.0","introduced":"4.0.0"},{"fixed":"3.10.5","introduced":"3.3.0"},{"fixed":"2.4.5","introduced":"2.2.0"},{"fixed":"2.1.16","introduced":"2.0.0"},{"fixed":"1.30.4","introduced":"0"}],"component":"phpoffice/phpspreadsheet","cve_ids":["CVE-2026-40296"],"ecosystem":"Packagist","epss":0.00225,"exploited":false,"fixed_versions":["5.7.0","3.10.5","2.4.5","2.1.16","1.30.4"],"ghsa_id":"GHSA-hrmw-qprp-wgmc","id":"tcs_01M5KF3XFBQR5MP573F2VV5VJ6","modified_at":"2026-05-08T19:50:57.048795Z","published_at":"2026-04-28T22:57:13Z","references":["https://osv.dev/vulnerability/GHSA-hrmw-qprp-wgmc","https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-hrmw-qprp-wgmc","https://nvd.nist.gov/vuln/detail/CVE-2026-40296","https://github.com/PHPOffice/PhpSpreadsheet"],"severity":{"label":"medium","score":5.4},"sources":[{"source":"osv","source_id":"GHSA-hrmw-qprp-wgmc","url":"https://osv.dev/vulnerability/GHSA-hrmw-qprp-wgmc"}],"summary":"PhpSpreadsheet has XSS via number format code with @ text placeholder bypasses htmlspecialchars in HTML writer"}