CVE-2026-114403
PHPOffice PHPPresentation through 1.2.0 Deserialization via Reader\Serialized::load
- State
- Published
- Severity
- 9.2 Critical
- Published
- Oct 21, 2026
- Updated
- Oct 28, 2026
- Reserved
- Oct 21, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.2 Critical | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 8.1 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-502 Deserialization of Untrusted Data
Affected Products
| Product | Versions |
|---|---|
PHPPresentationPHPOffice |
|
References
- https://hackmd.io/@leediay/multiple_vulnerable_phppresentationthird-party-advisory
- https://github.com/PHPOffice/PHPPresentation/blob/1.2.0/src/PhpPresentation/Reader/Serialized.php#L77-L109technical-description
- https://github.com/PHPOffice/PHPPresentation/blob/1.2.0/src/PhpPresentation/IOFactory.php#L39technical-description
- https://github.com/PHPOffice/PHPPresentationproduct
- VulnCheck Advisory: PHPOffice PHPPresentation through 1.2.0 Deserialization via Reader\Serialized::loadthird-party-advisory
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