CVE-2026-35453

Packagist/phpoffice/phpspreadsheet CVE-2026-35453: medium, EPSS 0.24%

PhpSpreadsheet has XSS via NumberFormat @ Text Substitution in HTML Writer

Action: Upgrade phpoffice/phpspreadsheet to 1.30.4 or later.

composer require phpoffice/phpspreadsheet:5.7.0

composer require phpoffice/phpspreadsheet:3.10.5

composer require phpoffice/phpspreadsheet:2.4.5

composer require phpoffice/phpspreadsheet:2.1.16

composer require phpoffice/phpspreadsheet:1.30.4

Affected

Fixed versions

Sources

• osv: GHSA-6wpp-88cp-7q68
• https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-6wpp-88cp-7q68
• https://nvd.nist.gov/vuln/detail/CVE-2026-35453
• https://github.com/PHPOffice/PhpSpreadsheet

CVE-2026-35453 · published 2026-04-28T22:50:31Z · modified 2026-05-08T15:50:49.240394Z · JSON