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  4. CVE 2026 114403 phpoffice phppresentation through 120
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Back to active CVEs
Critical · CVSS 9.2CVE-2026-114403

PHPOffice PHPPresentation through 1.2.0 Deserialization via Reader\Serialized::loadCVE-2026-114403

Answer in brief

CVE-2026-114403 records a Critical severity (CVSS 9.2) vulnerability in PHPOffice PHPPresentation through 1.2.0 Deserialization via Reader\Serialized::load. The current sources do not mark it as known exploited. The current feed maps PHPOffice/PHPPresentation (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 21, 2026Updated Oct 21, 2026Source checked Oct 21, 2026First seen by HOL Oct 21, 2026Material review Oct 21, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.2
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 9.2. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps PHPOffice/PHPPresentation (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
PHPOffice/PHPPresentationgeneric>=0 <=1.2.0Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for PHPOffice/PHPPresentation.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Oct 21, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 21, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 21, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencehackmd.io
  • Source referencevulncheck.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • PHPPresentation 1.2.0 XSS via Writer\HTML Text Runs, Hyperlinks and DescriptionsSame phpoffice/phppresentation package

Record context

Vulnerability class
Deserialization
EPSS
Not reported
CWE IDs
CWE-502
Source
CVE List V5
Source checked
Oct 21, 2026
References
5 linked sources
Open source record