{"action":"Upgrade phpoffice/phpspreadsheet to 1.30.5 or later.","affected":[{"fixed":"1.30.5","introduced":"0"}],"component":"phpoffice/phpspreadsheet","cve_ids":["CVE-2026-45034"],"ecosystem":"Packagist","epss":0.00462,"exploited":false,"fixed_versions":["1.30.5"],"ghsa_id":"GHSA-87m4-826x-3crx","id":"tcs_01M5KEYSG3S78DN0VNZZN3E4X3","modified_at":"2026-09-10T03:50:48.782870669Z","published_at":"2026-06-08T23:00:14Z","references":["https://osv.dev/vulnerability/GHSA-87m4-826x-3crx","https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-87m4-826x-3crx","https://github.com/PHPOffice/PhpSpreadsheet","https://github.com/advisories/GHSA-q4q6-r8wh-5cgh"],"severity":{"label":"critical","score":9.2},"sources":[{"source":"osv","source_id":"GHSA-87m4-826x-3crx","url":"https://osv.dev/vulnerability/GHSA-87m4-826x-3crx"},{"source":"nvd","source_id":"CVE-2026-45034","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45034"}],"summary":"PHPSpreadsheet has a patch bypass for CVE-2026-34084"}