CVE-2026-114403

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.

CVSS 4.0

9.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.5% chance of exploitation in the next 30 days; higher than 40% of CVEs (scores of 2026-10-25)

CWE

CWE-502

Published

2026-10-21

Modified

2026-10-22

Record from

the NVD, synced 2026-10-23

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

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