CVE-2026-91809
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 handling of malformed PDF form fields. Improper validation during field-name traversal may cause the application to access a released object, resulting in 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-2026-91809
EUVD
EUVD-2026-85154

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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

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Executive Summary

This vulnerability is a use-after-free issue in Foxit PDF Editor/Reader. It occurs when the application mishandles malformed PDF form fields, leading to improper validation during field-name traversal. This causes the application to access a released object, which can crash the program.

Impact Analysis

An attacker could exploit this to crash your Foxit PDF Editor/Reader application. In some cases, this might allow arbitrary code execution, potentially leading to unauthorized access or data manipulation on your system.

Compliance Impact

This vulnerability could potentially impact compliance with GDPR or HIPAA by causing application crashes during the processing of malformed PDFs, which may lead to data corruption or loss of sensitive information if not handled properly.

Mitigation Strategies

Update Foxit PDF Editor or Reader to the latest version to patch the use-after-free vulnerability in PDF form field handling.

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