CVE-2026-91802: Foxit PDF Editor/Reader — Heap Buffer Overflow in WebP Image Decoding via Bitmap Stride Confusion

Medium severity · published Sep 23, 2026

CVE-2026-91802

Foxit PDF Editor/Reader — Heap Buffer Overflow in WebP Image Decoding via Bitmap Stride Confusion

5.5

CVSS

0.1%

EPSS

On KEV

Description

A heap-based out-of-bounds write vulnerability exists in Foxit PDF Editor/Reader’s WebP image decoding due to improper handling of bitmap stride and target buffer formats. Successful exploitation could result in an application crash.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack vector

Local

Complexity

Low

Privileges

None

User interaction

Required

Confidentiality

None

Integrity

None

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.1% · higher than 1% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Foxit PDF Editor · Foxit Software Inc.

Versions 2026.2 and earlier; Versions 14.0.7 and earlier · source: vendor

Foxit PDF Reader · Foxit Software Inc.

Versions 2026.2 and earlier · source: vendor

Pdf Editor · Foxit

through 13.2.5.63482; 14.0.0.33046 through 14.0.7.33751; 2023.1.0.15510 through 2023.3.0.23028; 2024.1.0.23997 through 2024.4.1.27687; 2025.1.0.27937 through 2025.3.0.35737; 2026.1.0.36452 through 2026.2.0.39747 · source: NVD

Pdf Reader · Foxit

through 2026.2.0.39747 · source: NVD

Affected product

Foxit PDF Editor

Foxit Software Inc.

All Foxit PDF Editor CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-91802

CVE.org

https://www.cve.org/CVERecord?id=CVE-2026-91802

Vendor Advisory

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