Heap-Based Out-of-Bounds Write Vulnerability in Foxit PDF Editor/Reader
CVE-2026-91802

7.8HIGH

Key Information:

Vendor

Foxit Inc.

Status
Foxit PDF Editor
Foxit
Vendor
CVE Published:
23 September 2026

What is CVE-2026-91802?

A heap-based out-of-bounds write vulnerability has been identified in Foxit PDF Editor/Reader, primarily affecting the handling of WebP image decoding. This flaw arises from improper management of bitmap stride and target buffer formats, which could allow an attacker to manipulate the application's memory. Exploitation of this vulnerability may lead to unexpected application crashes, potentially compromising user experience and data integrity. It is essential for users of Foxit PDF Editor/Reader to apply the latest security patches available from Foxit Software to mitigate the risk of such vulnerabilities.

Affected Version(s)

Foxit PDF Editor Windows Versions 2026.2 and earlier

Foxit PDF Editor Windows Versions 14.0.7 and earlier

Foxit PDF Reader Windows Versions 2026.2 and earlier

References

https://www.foxit.com/support/security-bulletins.html

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Liang Zhu
.