CVE-2026-91805
Received Received - Intake

Use-After-Free in Foxit PDF Editor/Reader

Publication date: 2026-09-23

Last updated on: 2026-09-23

Assigner: Foxit

Description
A use-after-free vulnerability exists in Foxit PDF Editor/Reader’s PDF page-tree handling. A specially crafted PDF can trigger page-structure changes during rendering, causing the application to access released page objects and resulting in memory corruption and an application crash.

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Meta Information

Published
2026-09-23
Last Modified
2026-09-23
Generated
2026-09-23
AI Q&A
2026-09-23
EPSS Evaluated
N/A
NVD
CVE-2026-91805
EUVD
EUVD-2026-85123

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
foxit pdf_editor *
foxit pdf_reader *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-416 The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

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Executive Summary

This is a use-after-free vulnerability in Foxit PDF Editor/Reader. It occurs when the application's PDF page-tree handling processes a specially crafted PDF that triggers page-structure changes during rendering. This causes the app to access memory pages that have already been released, leading to memory corruption and crashes.

Impact Analysis

An attacker could exploit this to crash your Foxit PDF application, potentially allowing them to execute arbitrary code on your system. This could lead to data theft, system compromise, or further malicious activities depending on your system permissions.

Mitigation Strategies

Update Foxit PDF Editor or Reader to the latest version immediately to patch the use-after-free vulnerability in PDF page-tree handling.

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