CVE-2026-91806: Use After Free (CWE-416) in Foxit Software Inc. Foxit PDF Editor
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.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free condition (CWE-416) in Foxit PDF Editor/Reader's processing of PDF form fields. Embedded JavaScript code may reference form fields after they have been freed, leading to memory corruption and application crashes. The CVSS 3.1 score is 7.8, reflecting high impact on confidentiality, integrity, and availability. No vendor advisory or patch details are available to confirm remediation status.
Potential Impact
Successful exploitation can cause the Foxit PDF Editor or Reader application to crash, potentially leading to denial of service. The CVSS vector indicates local attack vector with low attack complexity, no privileges required, but user interaction is needed. The impact on confidentiality, integrity, and availability is rated high.
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 with embedded JavaScript from untrusted sources.
CVE-2026-91806: Use After Free (CWE-416) in Foxit Software Inc. Foxit PDF Editor
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.
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/Reader's processing of PDF form fields. Embedded JavaScript code may reference form fields after they have been freed, leading to memory corruption and application crashes. The CVSS 3.1 score is 7.8, reflecting high impact on confidentiality, integrity, and availability. No vendor advisory or patch details are available to confirm remediation status.
Potential Impact
Successful exploitation can cause the Foxit PDF Editor or Reader application to crash, potentially leading to denial of service. The CVSS vector indicates local attack vector with low attack complexity, no privileges required, but user interaction is needed. The impact on confidentiality, integrity, and availability is rated high.
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 with embedded JavaScript from untrusted sources.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Foxit
- Date Reserved
- 2026-09-15T07:34:43.393Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ab387caf7a7c541067c1671
Added to database: 09/23/2026, 08:03:22 UTC
Last enriched: 09/23/2026, 08:18:19 UTC
Last updated: 09/24/2026, 01:57:04 UTC
Views: 7
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