CVE-2026-91806
Received Received - Intake

Use-After-Free in Foxit PDF Editor/Reader via PDF Form Fields

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 PDF form fields. Embedded JavaScript may access form-field references after the corresponding fields have been released, 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-2026-91806
EUVD
EUVD-2026-85118

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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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 related to PDF form fields. It occurs when embedded JavaScript accesses form-field references after those fields have been released, causing the application to crash.

Impact Analysis

This vulnerability could allow an attacker to crash the application or potentially execute arbitrary code if they trick a user into opening a specially crafted PDF file. This may lead to denial of service or unauthorized access to system resources.

Mitigation Strategies

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

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