---
id: CVE-2026-114403
title: >-
  PHPOffice PHPPresentation through 1.2.0 Deserialization via
  Reader\Serialized::load
summary: >-
  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
  PhpPres…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-502
vendor: PHPOffice
product: PHPPresentation
affected:
  - PHPPresentation <= 1.2.0
published: '2026-10-21'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T12:39:55.570Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-114403'
references:
  - url: 'https://hackmd.io/@leediay/multiple_vulnerable_phppresentation'
  - url: >-
      https://github.com/PHPOffice/PHPPresentation/blob/1.2.0/src/PhpPresentation/Reader/Serialized.php#L77-L109
  - url: >-
      https://github.com/PHPOffice/PHPPresentation/blob/1.2.0/src/PhpPresentation/IOFactory.php#L39
  - url: 'https://github.com/PHPOffice/PHPPresentation'
  - url: >-
      https://www.vulncheck.com/advisories/phpoffice-phppresentation-through-1.2.0-deserialization-via-reader-serialized-load
    label: >-
      VulnCheck Advisory: PHPOffice PHPPresentation through 1.2.0
      Deserialization via Reader\Serialized::load
tags:
  - cve.org
ingestedAt: '2026-10-21T12:48:53.649Z'
---

## Overview

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.

## Affected

- `PHPPresentation <= 1.2.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.