CVE-2026-91790: CWE-416 Use after free in Foxit Software Inc. Foxit PDF Editor
When rendering the page image, Foxit PDF Editor/Reader fails to perform validation on image objects whose optional content attributes are malformed. As a result, the program may access an already-freed internal data structure, triggering a crash due to UAF.
AI Analysis
Technical Summary
The vulnerability arises from Foxit PDF Editor/Reader's failure to validate image objects with malformed optional content attributes during page image rendering. This leads to use-after-free (CWE-416), where the application accesses an internal data structure that has already been freed, resulting in a crash. The CVSS 3.1 vector indicates local attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation may cause the application to crash, leading to denial of service. The CVSS score indicates high impact on confidentiality, integrity, and availability, but no known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Users should monitor Foxit Software Inc. advisories for updates and apply patches once available.
CVE-2026-91790: CWE-416 Use after free in Foxit Software Inc. Foxit PDF Editor
Description
When rendering the page image, Foxit PDF Editor/Reader fails to perform validation on image objects whose optional content attributes are malformed. As a result, the program may access an already-freed internal data structure, triggering a crash due to UAF.
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
The vulnerability arises from Foxit PDF Editor/Reader's failure to validate image objects with malformed optional content attributes during page image rendering. This leads to use-after-free (CWE-416), where the application accesses an internal data structure that has already been freed, resulting in a crash. The CVSS 3.1 vector indicates local attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation may cause the application to crash, leading to denial of service. The CVSS score indicates high impact on confidentiality, integrity, and availability, but no known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Users should monitor Foxit Software Inc. advisories for updates and apply patches once available.
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: 6ab387c8f7a7c541067c1660
Added to database: 09/23/2026, 08:03:20 UTC
Last enriched: 09/23/2026, 08:32:48 UTC
Last updated: 09/24/2026, 02:03:00 UTC
Views: 12
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