CVE-2026-91805

Use-after-free Vulnerability in Foxit PDF Editor/Reader Page-tree Handling

Published Sep 23, 2026 CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Description
A use-after-free vulnerability exists in Foxit PDF Editor/Reader’s PDF page-tree handling. A specially crafted PDF can trigger page-structure changes during rendering, causing the application to access released page objects and resulting in memory corruption and an application crash.

Analysis

AI-generated

Technical impact

The vulnerability is a use‑after‑free flaw in the page‑tree handling code of Foxit PDF Editor and Reader. A PDF crafted to change the page structure while rendering can cause the application to reference memory that has already been freed, leading to memory corruption and a crash. The available description does not explicitly state arbitrary code execution, so the primary impact as described is a denial‑of‑service through application termination.

Affected Systems

Foxit Software Inc. products, specifically Foxit PDF Editor and Foxit PDF Reader, are affected. No version restrictions are provided, implying that all installations could be vulnerable until a vendor fix is released.

Risk and Exploitability

The CVSS base score of 7.8 indicates a high‑impact vulnerability. The EPSS score is below 1 %, suggesting a low probability of exploitation at this time, and it is not currently listed in the CISA KEV catalog. The likely attack vector is inferred to be a local user or an attacker who can supply a malicious PDF document to the victim. If the user opens such a file, the application will crash; a more severe effect is not reported by the vendor or the CVE description.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the latest Foxit update when available to fix the use‑after‑free risk
  • Avoid opening PDF documents from untrusted or unknown sources until the vendor releases a patch
  • If patching is delayed, run the application in a sandbox or disable scripting features to reduce the risk of memory corruption

Generated by OpenCVE AI on September 23, 2026 at 15:06 UTC.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Foxit
Foxit pdf Editor
Foxit pdf Reader
Microsoft
Microsoft windows
CPEs cpe:2.3:a:foxit:pdf_editor:*:*:*:*:*:*:*:*
cpe:2.3:a:foxit:pdf_reader:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
Vendors & Products Foxit
Foxit pdf Editor
Foxit pdf Reader
Microsoft
Microsoft windows
Type Values Removed Values Added
First Time appeared Foxitsoftware
Foxitsoftware foxit Pdf Editor
Foxitsoftware foxit Reader
Vendors & Products Foxitsoftware
Foxitsoftware foxit Pdf Editor
Foxitsoftware foxit Reader
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A use-after-free vulnerability exists in Foxit PDF Editor/Reader’s PDF page-tree handling. A specially crafted PDF can trigger page-structure changes during rendering, causing the application to access released page objects and resulting in memory corruption and an application crash.
Title Use-after-free Vulnerability in Foxit PDF Editor/Reader Page-tree Handling
Weaknesses CWE-416
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Foxit
Published
Updated
Sep 23, 2026, 2:45 PM
Reserved
Sep 15, 2026, 7:34 AM
Status
Analyzed
Published
Sep 23, 2026, 8:17 AM
Modified
Oct 8, 2026, 12:20 PM