CVE-2026-91806

HighCVSS 7.8/10Last modified Oct 8, 2026

Description

A use-after-free vulnerability exists in Foxit PDF Editor/Reader’s handling of PDF form fields. Embedded JavaScript may access form-field references after the corresponding fields have been released, resulting in an application crash.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

Affected software

No affected versions have been published.

Timeline

Published
Sep 23, 2026
Last modified
Oct 8, 2026
NVD status
Analyzed

Related CVEs from 2026

CVE-2026-918076.1A heap-based out-of-bounds read vulnerability exists in Foxit PDF Editor/Reader’s handling of malformed image soft-mask data. Insufficient vCVE-2026-918086.1A heap-based out-of-bounds read vulnerability exists in Foxit PDF Editor Reader’s handling of PDF image objects with inconsistent compressioCVE-2026-918097.8A use-after-free vulnerability exists in Foxit PDF Editor/Reader’s handling of malformed PDF form fields. Improper validation during field-nCVE-2026-91817.5Esri ArcGIS Server contains a directory traversal vulnerability. ArcGIS Enterprise on Kubernetes is not impacted. An unauthenticated attackeCVE-2026-918106.1A heap-based out-of-bounds read vulnerability exists in Foxit PDF Editor/Reader’s handling of malformed PDF image masks. Inconsistent image CVE-2026-918117.8A heap-based out-of-bounds write vulnerability exists in Foxit PDF Editor/Reader’s PRC parser due to insufficient validation of vertex indicCVE-2026-918128.1A vulnerability in Foxit PDF Editor/Reader’s update mechanism allows man-in-the-middle attackers to bypass certificate validation and packagCVE-2026-918137.8A vulnerability in Foxit PDF Editor/Reader’s update mechanism allows an update package to be replaced between download and high-privilege exCVE-2026-918145.3A signature validation vulnerability exists in Foxit PDF Editor/Reader’s handling of incrementally updated PDF documents. Changes to visibleCVE-2026-918157.8Foxit PDF Editor/Reader does not perform sufficient verification of the JPEG2000 image metadata in the PDF file, which leads to out-of-boundCVE-2026-918167.8A use-after-free vulnerability exists in Foxit PDF Editor/Reader’s handling of PDF annotations. Reentrant annotation deletion triggered by eCVE-2026-918176.1A heap-based out-of-bounds read vulnerability exists in Foxit PDF Editor/Reader’s handling of wide strings in embedded PDF JavaScript. Insuf
CVE-2026-91806: High severity, CVSS 7.8 | Vulnix