CVE-2026-91816: Use After Free (CWE-416) in Foxit Software Inc. Foxit PDF Editor
CVE-2026-91816 is a use-after-free vulnerability in Foxit PDF Editor and Reader related to handling PDF annotations. The flaw occurs when embedded JavaScript triggers reentrant deletion of annotations, causing the application to access freed memory. This results in a use-after-free condition that can lead to application crashes. The vulnerability has a high severity rating with a CVSS score of 7.8. No affected versions or patch information are provided in the available data.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free condition in Foxit PDF Editor/Reader's processing of PDF annotations. Specifically, embedded JavaScript can cause reentrant deletion of annotations, leading the software to access annotation objects after they have been released. This unsafe memory access results in application crashes. The CVSS 3.1 score is 7.8, indicating high severity, with impact on confidentiality, integrity, and availability. No vendor advisory or patch information is currently available.
Potential Impact
Successful exploitation can cause the Foxit PDF Editor or Reader application to crash due to accessing freed memory. The CVSS score indicates potential high impact on confidentiality, integrity, and availability, but no confirmed exploit or further impact details are provided.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should exercise caution when opening PDF files from untrusted sources, especially those containing embedded JavaScript.
CVE-2026-91816: Use After Free (CWE-416) in Foxit Software Inc. Foxit PDF Editor
Description
CVE-2026-91816 is a use-after-free vulnerability in Foxit PDF Editor and Reader related to handling PDF annotations. The flaw occurs when embedded JavaScript triggers reentrant deletion of annotations, causing the application to access freed memory. This results in a use-after-free condition that can lead to application crashes. The vulnerability has a high severity rating with a CVSS score of 7.8. No affected versions or patch information are provided in the available data.
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 in Foxit PDF Editor/Reader's processing of PDF annotations. Specifically, embedded JavaScript can cause reentrant deletion of annotations, leading the software to access annotation objects after they have been released. This unsafe memory access results in application crashes. The CVSS 3.1 score is 7.8, indicating high severity, with impact on confidentiality, integrity, and availability. No vendor advisory or patch information is currently available.
Potential Impact
Successful exploitation can cause the Foxit PDF Editor or Reader application to crash due to accessing freed memory. The CVSS score indicates potential high impact on confidentiality, integrity, and availability, but no confirmed exploit or further impact details are provided.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should exercise caution when opening PDF files from untrusted sources, especially those containing embedded JavaScript.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Foxit
- Date Reserved
- 2026-09-15T07:34:45.816Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ab387ccf7a7c541067c167c
Added to database: 09/23/2026, 08:03:24 UTC
Last enriched: 09/23/2026, 08:17:44 UTC
Last updated: 09/23/2026, 09:02:37 UTC
Views: 5
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