CVE-2026-45034: PHPSpreadsheet has a patch bypass for CVE-2026-34084

critical Affects phpoffice/phpspreadsheet. Feed 2026.10.29.1, updated 2026-10-28; published 2026-06-08; advisory modified 2026-09-10.

PHPSpreadsheet has a patch bypass for CVE-2026-34084

Package: phpoffice/phpspreadsheet Composer
Affected versions: <1.30.5
Fixed in: 1.30.5
Severity: critical
Exploitation: not on CISA KEV · EPSS 0% (40.0th percentile)
Published: 2026-06-08
Source: osv.dev

References

CWE-502

NVD record phpoffice/phpspreadsheet advisories

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Find out in one command. phpwarden checks your composer.lock against this advisory and 20,000+ others, ranked by real-world exploitation (CISA KEV + EPSS). Free, offline, open data.

# PHP projects (recommended)
composer require --dev phpwarden/phpwarden
# then
vendor/bin/phpwarden deps composer.lock

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CVE-2020-7776 medium Cross-site scripting in phpoffice/phpspreadsheet same package: phpoffice/phpspreadsheet
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