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CVE-2026-91806— Foxit PDF Editor/Reader Doc Object Use-After-Free Information Disclosure Vulnerability

Quick assessment

Affected
Foxit Software Inc. Foxit PDF Editor
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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.

CVSS 7.8 · High
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I. Basic Information for CVE-2026-91806

Vulnerability Information

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Vulnerability Title
Foxit PDF Editor/Reader Doc Object Use-After-Free Information Disclosure Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Foxit Software Inc. Foxit PDF Editor Versions 2026.2 and earlier -
Foxit Software Inc. Foxit PDF Reader Versions 2026.2 and earlier -

II. Public POCs for CVE-2026-91806

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III. Intelligence Information for CVE-2026-91806

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Same Patch Batch · Foxit Software Inc. · 2026-09-23 · 31 CVEs total

CVE-2026-91803 8.8 HIGH Security Vulnerability Report – Foxit PDF Editor/Reader Updater DLL Search Path Hijacking
CVE-2026-91800 8.8 HIGH Foxit PDF Editor installer local privilege escalation
CVE-2026-91798 8.8 HIGH Foxit PDF Editor/Reader Updater Privilege Escalation
CVE-2026-91813 8.8 HIGH Foxit PDF Editor/Reader FoxitUpdater Race Condition Local Privilege Escalation Vulnerabili
CVE-2026-91812 7.9 HIGH Foxit PDF Editor/Reader FoxitUpdater Improper Certificate Validation Local Privilege Escal
CVE-2026-91809 7.8 HIGH Foxit PDF Editor/Reader Annotation Use-After-Free Information Disclosure Vulnerability
CVE-2026-91811 7.8 HIGH Foxit PDF Editor/Reader PRC Stream Parsing Out-Of-Bounds Write Remote Code Execution Vulne
CVE-2026-91804 7.8 HIGH Foxit PDF Editor/Reader Out-of-bounds Write Vulnerability While Rendering
CVE-2026-91801 7.8 HIGH Foxit PDF Editor/Reader RichMedia Annotation Directory Traversal Remote Code Execution Vul
CVE-2026-91797 7.8 HIGH Foxit PDF Editor/Reader Portfolio Directory Traversal Remote Code Execution Vulnerability
CVE-2026-91789 7.8 HIGH Foxit PDF Editor/Reader U3D File Parsing Integer Overflow Remote Code Execution Vulnerabil
CVE-2026-91791 7.8 HIGH Foxit PDF Editor/Reader Annotation Use-After-Free Remote Code Execution Vulnerability
CVE-2026-91816 7.8 HIGH Foxit PDF Editor/Reader AcroForm Use-After-Free Remote Code Execution Vulnerability
CVE-2026-91790 7.8 HIGH Foxit PDF Editor/Reader Doc Object Use-After-Free Information Disclosure Vulnerability
CVE-2026-91815 7.8 HIGH Foxit PDF Editor/Reader JPEG2000 Parsing Memory Corruption Remote Code Execution Vulnerabi
CVE-2026-91818 7.8 HIGH Foxit PDF Editor/Reader Annotation Use-After-Free Remote Code Execution Vulnerability
CVE-2026-91794 7.8 HIGH Foxit PDF Editor/Reader DeviceN Colorspace Out-Of-Bounds Write Remote Code Execution Vulne
CVE-2026-91793 7.8 HIGH Foxit PDF Editor/Reader Doc Object Use-After-Free Information Disclosure Vulnerability
CVE-2026-91799 7.8 HIGH Foxit Editor/Reader Array resetForm Use-After-Free Vulnerability
CVE-2026-91795 7.8 HIGH Foxit PDF Editor/Reader FileOpen Uninitialized Variable Remote Code Execution Vulnerabilit

Showing top 20 of 31 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Foxit PDF Editor
Same vendor: Foxit Software Inc.
Same weakness: CWE-416

V. Comments for CVE-2026-91806

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