CVE-2026-91792
Received Received - Intake

Use-After-Free in Foxit PDF Editor/Reader via JavaScript Actions

Publication date: 2026-09-23

Last updated on: 2026-09-23

Assigner: Foxit

Description
When processing a specially crafted PDF, Foxit PDF Editor/Reader may perform reentrant zoom and layout operations through page- and annotation-related JavaScript actions. This can cause the application to access page objects after they have been released, resulting in a use-after-free condition 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-2026-91792
EUVD
EUVD-2026-85130

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
foxit pdf_editor_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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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 occurs when Foxit PDF Editor or Reader processes a specially crafted PDF file containing malicious JavaScript actions. These actions trigger reentrant zoom and layout operations that lead to accessing page objects after they have been released, causing a use-after-free condition and application crash.

Impact Analysis

If exploited, this vulnerability could allow an attacker to crash the application or potentially execute arbitrary code on your system. This may lead to unauthorized access, data theft, or further compromise of your device depending on the attacker's goals.

Mitigation Strategies

Update Foxit PDF Editor/Reader to the latest version to patch the vulnerability. Avoid opening untrusted PDF files or disable JavaScript in the application settings to reduce attack surface.

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