CVE-2026-91807: Out-of-bounds Read (CWE-125) in Foxit Software Inc. Foxit PDF Editor
A heap-based out-of-bounds read vulnerability exists in Foxit PDF Editor/Reader’s handling of malformed image soft-mask data. Insufficient validation of the soft-mask data attribute during image parsing may cause an arithmetic underflow, resulting in an out-of-bounds read and application crash.
AI Analysis
Technical Summary
This vulnerability in Foxit PDF Editor/Reader involves insufficient validation of the soft-mask data attribute in images. When processing malformed image soft-mask data, an arithmetic underflow may occur, resulting in a heap-based out-of-bounds read. This can cause the application to crash, impacting availability. The CVSS 3.1 vector indicates the attack requires local access with low complexity, no privileges, and user interaction, affecting confidentiality minimally but causing high impact on availability.
Potential Impact
Successful exploitation can cause the Foxit PDF Editor or Reader application to crash due to an out-of-bounds read triggered by malformed image soft-mask data. The impact is limited to denial of service (application crash) with low confidentiality impact and no integrity impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch information is provided. Until a patch is available, avoid opening untrusted PDF files with malformed image soft-mask data to mitigate risk.
CVE-2026-91807: Out-of-bounds Read (CWE-125) in Foxit Software Inc. Foxit PDF Editor
Description
A heap-based out-of-bounds read vulnerability exists in Foxit PDF Editor/Reader’s handling of malformed image soft-mask data. Insufficient validation of the soft-mask data attribute during image parsing may cause an arithmetic underflow, resulting in an out-of-bounds read and application crash.
CVSS v3.1
Score 6.1medium
Affected software
Foxit Software Inc.
Foxit PDF Editor
Foxit Software Inc.
Foxit PDF Editor
Foxit Software Inc.
Foxit PDF Reader
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Foxit PDF Editor/Reader involves insufficient validation of the soft-mask data attribute in images. When processing malformed image soft-mask data, an arithmetic underflow may occur, resulting in a heap-based out-of-bounds read. This can cause the application to crash, impacting availability. The CVSS 3.1 vector indicates the attack requires local access with low complexity, no privileges, and user interaction, affecting confidentiality minimally but causing high impact on availability.
Potential Impact
Successful exploitation can cause the Foxit PDF Editor or Reader application to crash due to an out-of-bounds read triggered by malformed image soft-mask data. The impact is limited to denial of service (application crash) with low confidentiality impact and no integrity impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch information is provided. Until a patch is available, avoid opening untrusted PDF files with malformed image soft-mask data to mitigate risk.
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: 6ab387caf7a7c541067c1672
Added to database: 09/23/2026, 08:03:22 UTC
Last enriched: 09/23/2026, 08:18:44 UTC
Last updated: 09/24/2026, 01:57:04 UTC
Views: 11
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