Reentrant Execution Vulnerability in Foxit PDF Editor/Reader
CVE-2026-91791

7.8HIGH

Key Information:

Vendor

Foxit Inc.

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

What is CVE-2026-91791?

Foxit PDF Editor/Reader is susceptible to a vulnerability when handling specially crafted PDF files. The issue arises due to a reentrant execution condition involving JavaScript, which can be triggered by page-visibility events. This flaw may lead the application to access a released page-view object while calculating annotation boundaries, resulting in invalid memory reads and potentially causing the application to crash. Users are advised to update to the latest version to mitigate this risk.

Affected Version(s)

Foxit PDF Editor Windows Versions 2026.2 and earlier

Foxit PDF Editor Windows Versions 14.0.7 and earlier

Foxit PDF Editor Windows Versions 13.2.6 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

Anonymous working with TrendAI Zero Day Initiative
.