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CVE-2026-34084

1 advisory.

Packagist/phpoffice/phpspreadsheet CVE-2026-34084: critical

PhpSpreadsheet has SSRF/RCE in IOFactory::load when $filename is user controlled

Action: Upgrade phpoffice/phpspreadsheet to 1.30.3 or later.

composer require phpoffice/phpspreadsheet:5.6.0
composer require phpoffice/phpspreadsheet:3.10.4
composer require phpoffice/phpspreadsheet:2.4.4
composer require phpoffice/phpspreadsheet:2.1.15
composer require phpoffice/phpspreadsheet:1.30.3

Affected

introducedfixedlast affected
4.0.05.6.0-
3.3.03.10.4-
2.2.02.4.4-
2.0.02.1.15-
01.30.3-

Fixed versions

5.6.03.10.42.4.42.1.151.30.3

Sources

CVE-2026-34084 · published · modified · JSON