CVE-2026-91818
Received Received - Intake

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

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 JavaScript handling of PDF annotations. Reentrant page-event processing during annotation enumeration may release the associated page object, which is subsequently accessed, 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-2026-91818
EUVD
EUVD-2026-85156

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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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's JavaScript handling of PDF annotations. It occurs when reentrant page-event processing during annotation enumeration releases the associated page object, which is then accessed again, causing an application crash.

Impact Analysis

This vulnerability could allow an attacker to crash the application, potentially leading to denial of service. If exploited, it might also enable arbitrary code execution, posing risks to data integrity and confidentiality on affected systems.

Mitigation Strategies

Update Foxit PDF Editor or Reader to the latest version to patch the use-after-free vulnerability in JavaScript handling of PDF annotations.

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