Use-After-Free Vulnerability in Foxit PDF Editor/Reader Affecting Annotation Handling
CVE-2026-91816

7.8HIGH

Key Information:

Vendor

Foxit Inc.

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

What is CVE-2026-91816?

A use-after-free vulnerability is present in the Foxit PDF Editor/Reader, specifically within its management of PDF annotations. An attacker can exploit this flaw through reentrant annotation deletion initiated via embedded JavaScript, leading to the application accessing an annotation object after it has been freed. This flaw can potentially result in application instability and crashes, affecting the user experience and system integrity.

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
.