CVE-2026-91791: CWE-416 Use after free in Foxit Software Inc. Foxit PDF Editor
When processing a specially crafted PDF file, Foxit PDF Editor/Reader may encounter a reentrant execution condition involving JavaScript triggered by page-visibility events. This can cause the application to access a released page-view object while calculating annotation boundaries, resulting in an invalid memory read and application crash.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free condition (CWE-416) in Foxit PDF Editor when handling specially crafted PDF files containing JavaScript that triggers page-visibility events. The reentrant execution leads to the application accessing a page-view object that has already been released, causing an invalid memory read and application crash. The CVSS v3.1 score is 7.8, indicating high severity with impacts on confidentiality, integrity, and availability. No affected versions or patch information are provided in the available data.
Potential Impact
Successful exploitation can cause the Foxit PDF Editor application to crash due to invalid memory access. The CVSS score indicates high impact on confidentiality, integrity, and availability, but no evidence of active exploitation in the wild is reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch information is provided in the available data. Users should monitor Foxit Software Inc. advisories for updates and apply patches once available. Until then, exercise caution when opening untrusted PDF files that may contain malicious JavaScript.
CVE-2026-91791: CWE-416 Use after free in Foxit Software Inc. Foxit PDF Editor
Description
When processing a specially crafted PDF file, Foxit PDF Editor/Reader may encounter a reentrant execution condition involving JavaScript triggered by page-visibility events. This can cause the application to access a released page-view object while calculating annotation boundaries, resulting in an invalid memory read and application crash.
CVSS v3.1
Score 7.8high
Affected software
Foxit Software Inc.
Foxit PDF Editor
Foxit Software Inc.
Foxit PDF Reader
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a use-after-free condition (CWE-416) in Foxit PDF Editor when handling specially crafted PDF files containing JavaScript that triggers page-visibility events. The reentrant execution leads to the application accessing a page-view object that has already been released, causing an invalid memory read and application crash. The CVSS v3.1 score is 7.8, indicating high severity with impacts on confidentiality, integrity, and availability. No affected versions or patch information are provided in the available data.
Potential Impact
Successful exploitation can cause the Foxit PDF Editor application to crash due to invalid memory access. The CVSS score indicates high impact on confidentiality, integrity, and availability, but no evidence of active exploitation in the wild is reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch information is provided in the available data. Users should monitor Foxit Software Inc. advisories for updates and apply patches once available. Until then, exercise caution when opening untrusted PDF files that may contain malicious JavaScript.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Foxit
- Date Reserved
- 2026-09-15T07:34:40.287Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ab387c8f7a7c541067c1661
Added to database: 09/23/2026, 08:03:20 UTC
Last enriched: 09/23/2026, 08:32:45 UTC
Last updated: 09/24/2026, 01:57:04 UTC
Views: 9
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