CVE-2026-114403CWE-502insecure-deserialization

CVE-2026-114403

High · published October 21, 2026

CVSS v3.1
8.1
EPSS
0%
Percentile
40.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
9.2 · 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
EPSS
0.00477 · 40.2th percentile
Weakness
CWE-502 · Deserialization of Untrusted Data
Published
2026-10-21T17:18Z
References (5)
https://github.com/PHPOffice/PHPPresentation · [email protected]https://github.com/PHPOffice/PHPPresentation/blob/1.2.0/src/PhpPresentation/IOFactory.php#L39 · [email protected]https://github.com/PHPOffice/PHPPresentation/blob/1.2.0/src/PhpPresentation/Reader/Serialized.php#L77-L109 · [email protected]https://hackmd.io/@leediay/multiple_vulnerable_phppresentation · [email protected]https://www.vulncheck.com/advisories/phpoffice-phppresentation-through-1.2.0-deserialization-via-reader-serialized-load · [email protected]
EPSS history
Timeline
  • 23 OCT 03:55Z
    EPSS moved — → 0%
    epss
  • 21 OCT 12:39Z
    PHPOffice PHPPresentation through 1.2.0 Deserialization via Reader\Serialized::load
    cvelistv5
  • 21 OCT 12:39Z
    PHPOffice PHPPresentation through 1.2.0 Deserialization via Reader\Serialized::load
    cvelistv5