What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-23 · updated 2026-10-08
• Weakness: CWE-787

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.

Affected products

• Foxit PDF Reader: through 13.2.5.63482; from 14.0.0.33046 through 14.0.7.33751; from 2023.1.0.15510 through 2023.3.0.23028; from 2024.1.0.23997 through 2024.4.1.27687; from 2025.1.0.27937 through 2025.3.0.35737; from 2026.1.0.36452 through 2026.2.0.39747
• Foxit Pdf Reader: through 2026.2.0.39747

References

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

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