CVE-2026-91806: Foxit PDF Editor/Reader Doc Object Use-After-Free Information Disclosure Vulnerability
Published Sep 23, 2026
·Updated
A use-after-free vulnerability exists in Foxit PDF Editor/Reader’s handling of PDF form fields. Embedded JavaScript may access form-field references after the corresponding fields have been released, resulting in an application crash.
Affected Software
9 affected components
Foxit PDF Editor/Reader
All of the following
Any of the following
Foxit PDF Editor<=13.2.5.63482
Foxit PDF Editor>=14.0.0.33046<=14.0.7.33751
Foxit PDF Editor>=2023.1.0.15510<=2023.3.0.23028
Foxit PDF Editor>=2024.1.0.23997<=2024.4.1.27687
Foxit PDF Editor>=2025.1.0.27937<=2025.3.0.35737
Foxit PDF Editor>=2026.1.0.36452<=2026.2.0.39747
Foxit PDF Reader<=2026.2.0.39747
Microsoft Windows
Event History
Sep 23, 2026
CVE Published
via MITRE·07:50 AM
Data Sourced
via MITRE·07:50 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·08:17 AM
DescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What must an attacker provide to trigger this issue?
The issue is triggered through a PDF containing form fields and embedded JavaScript. User interaction is required, and exploitation is local according to the supplied vector.
2
What is the confirmed impact?
The provided description confirms that accessing released form-field references can crash Foxit PDF Editor or Reader. The severity vector also rates confidentiality, integrity, and availability impact as high.