Package impact

php COMPOSER / phpoffice/phpspreadsheet

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KEVHas exploit
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CVE Severity CVSS Risk Published Description Impact
CVE-2026-40902 high 7.5 7.5 28d ago PhpSpreadsheet has CPU Denial of Service via Unbounded Row Number in XLSX Row Dimensions php
CVE-2026-40863 high 7.5 7.5 28d ago PhpSpreadsheet has CPU Denial of Service via Unbounded Row Index in SpreadsheetML XML Reader php
CVE-2026-40296 medium 5.4 5.4 29d ago PhpSpreadsheet has XSS via number format code with @ text placeholder bypasses htmlspecialchars in HTML writer php
CVE-2026-35453 medium 5.4 5.4 29d ago PhpSpreadsheet has XSS via NumberFormat @ Text Substitution in HTML Writer php