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MEDIUM · 6.1

CVE-2026-91817

A heap-based out-of-bounds read vulnerability exists in Foxit PDF Editor/Reader’s handling of wide strings in embedded PDF JavaScript. Insufficient validation of string-deletion ranges can cause an in...

Vulnerability Description

A heap-based out-of-bounds read vulnerability exists in Foxit PDF Editor/Reader’s handling of wide strings in embedded PDF JavaScript. Insufficient validation of string-deletion ranges can cause an integer underflow, resulting in an out-of-bounds read and application crash.

CVSS Score

6.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
HIGH

Affected Products

VendorProductVersions
FoxitPdf Editor<= 13.2.5.63482
FoxitPdf Reader<= 2026.2.0.39747

Related Weaknesses (CWE)

CWE-125

References

FAQ

What is CVE-2026-91817?

CVE-2026-91817 is a vulnerability with a CVSS score of 6.1 (MEDIUM). A heap-based out-of-bounds read vulnerability exists in Foxit PDF Editor/Reader’s handling of wide strings in embedded PDF JavaScript. Insufficient validation of string-deletion ranges can cause an in...

How severe is CVE-2026-91817?

CVE-2026-91817 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-91817?

Check the references section above for vendor advisories and patch information. Affected products include: Foxit Pdf Editor, Foxit Pdf Reader.