Authorization Bypass in Foxit PDF Editor/Reader
CVE-2026-91788

4.7MEDIUM

Key Information:

Vendor

Foxit Inc.

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

What is CVE-2026-91788?

The implementation of the JavaScript interface in Foxit PDF Editor/Reader lacks the necessary attribute authorization checks as per established specifications. This flaw enables a malicious PDF, deemed trusted by the system, to potentially exploit this gap and access sensitive information from other documents in the same process. Subsequently, it could transmit this data externally, posing significant risks to user confidentiality and data 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:
4.7
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

kai63001 working with TrendAI Zero Day Initiative
.