PHPSpreadsheet CPU DoS via Unbounded Row Number in XLSX
Security AdvisoryHighPHPOffice
Affected:
- phpoffice/phpspreadsheet >= 4.0.0, < 5.6.0
- phpoffice/phpspreadsheet >= 3.3.0, < 3.10.4
- phpoffice/phpspreadsheet >= 2.2.0, < 2.4.4
- phpoffice/phpspreadsheet >= 2.0.0, < 2.1.15
- phpoffice/phpspreadsheet <= 1.30.3
Fixed in:
- 5.7.0
- 3.10.5
- 2.4.5
- 2.1.16
- 1.30.4
Referenced CVEs: CVE-2026-40902 · 7.5
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