CVE-2026-114403

CVSS 9.2 (critical) · published 2026-10-21

PHPOffice PHPPresentation through 1.2.0 contains an insecure deserialization vulnerability that allows attackers to instantiate arbitrary PHP objects by supplying a crafted presentation file. Attackers can upload a ZIP containing PhpPresentation.xml that IOFactory::load passes to unserialize(), enabling gadget-chain code execution, file writes, or denial of service.

Weakness: CWE-502

Source: NVD CVE-2026-114403

References

• https://github.com/PHPOffice/PHPPresentation
• https://github.com/PHPOffice/PHPPresentation/blob/1.2.0/src/PhpPresentation/IOFactory.php#L39
• https://github.com/PHPOffice/PHPPresentation/blob/1.2.0/src/PhpPresentation/Reader/Serialized.php#L77-L109
• https://hackmd.io/@leediay/multiple_vulnerable_phppresentation
• https://www.vulncheck.com/advisories/phpoffice-phppresentation-through-1.2.0-deserialization-via-reader-serialized-load
• https://hackmd.io/@leediay/multiple_vulnerable_phppresentation

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