{"action":"Upgrade phpoffice/phpspreadsheet to 1.30.6 or later.","affected":[{"fixed":"5.8.1","introduced":"4.0.0"},{"fixed":"3.10.7","introduced":"3.3.0"},{"fixed":"2.4.7","introduced":"2.2.0"},{"fixed":"2.1.18","introduced":"2.0.0"},{"fixed":"1.30.6","introduced":"0"}],"component":"phpoffice/phpspreadsheet","cve_ids":["CVE-2026-59933"],"ecosystem":"Packagist","epss":0.00461,"exploited":false,"fixed_versions":["5.8.1","3.10.7","2.4.7","2.1.18","1.30.6"],"ghsa_id":"GHSA-xh5m-36r6-47m3","id":"tcs_01M5KFB29VMSVJ1Y5JFJ72T311","modified_at":"2026-07-23T16:27:55.018643Z","published_at":"2026-07-23T15:01:50Z","references":["https://osv.dev/vulnerability/GHSA-xh5m-36r6-47m3","https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-xh5m-36r6-47m3","https://github.com/PHPOffice/PhpSpreadsheet/commit/85f2556b0bf5269061bf45932ecda8a128d81750","https://github.com/PHPOffice/PhpSpreadsheet","https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/1.30.6","https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.1.18","https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.4.7","https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/3.10.7","https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/5.8.1"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GHSA-xh5m-36r6-47m3","url":"https://osv.dev/vulnerability/GHSA-xh5m-36r6-47m3"}],"summary":"PHPSpreadsheet: XLS/OLE sector-chain self-loop causes memory exhaustion"}