Is CVE-2026-91801 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-91801 being exploited in the wild.

How severe is CVE-2026-91801?

High severity, with a CVSS score of 7.8, published 23 September 2026.

Which products and versions are affected?

Foxit PDF Editor 2026.2.0.39747 and all previous 2026.x versions, 2025.3.0.35737 and all previous 2025.x versions, 2024.4.1.27687 and all previous 2024.x versions, 2023.3.0.23028 and all previous 2023.x versions, 14.0.7.33751 and all previous 14.x versions, 13.2.6.24111 and earlier; Foxit PDF Reader 2026.2.0.39747 and earlier.

Is there a fix for CVE-2026-91801?

A patch was published on 2026-09-23: Fixed in Foxit PDF Reader 2026.2.1 and Foxit PDF Editor 2026.2.1/14.0.8 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-91801 attacked?

It is attacked with local access, in a software library.

Am I affected by CVE-2026-91801?

Check whether you run Foxit PDF Editor or Foxit PDF Reader at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-91801: Foxit PDF Editor path traversal in embedded resource handling

CVE-2026-91801 · Severity: high · CVSS 7.8 · Published 2026-09-23

Foxit PDF Editor and Reader, widely used tools for viewing and editing PDF documents, contain a path traversal vulnerability in how they handle embedded PDF resources. An attacker could exploit this by crafting a malicious PDF that writes files to arbitrary locations on a user's system, potentially leading to arbitrary code execution when the document is opened.

Technologies: Foxit PDF Editor, Foxit PDF Reader. Vendors: Foxit.

Quick answers

Is CVE-2026-91801 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-91801 being exploited in the wild.
How severe is CVE-2026-91801?: High severity, with a CVSS score of 7.8, published 23 September 2026.
Which products and versions are affected?: Foxit PDF Editor 2026.2.0.39747 and all previous 2026.x versions, 2025.3.0.35737 and all previous 2025.x versions, 2024.4.1.27687 and all previous 2024.x versions, 2023.3.0.23028 and all previous 2023.x versions, 14.0.7.33751 and all previous 14.x versions, 13.2.6.24111 and earlier; Foxit PDF Reader 2026.2.0.39747 and earlier.
Is there a fix for CVE-2026-91801?: A patch was published on 2026-09-23: Fixed in Foxit PDF Reader 2026.2.1 and Foxit PDF Editor 2026.2.1/14.0.8 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-91801 attacked?: It is attacked with local access, in a software library.
Am I affected by CVE-2026-91801?: Check whether you run Foxit PDF Editor or Foxit PDF Reader at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A path traversal vulnerability exists in the PDF resource file path validation logic, allowing insufficient validation of resource file paths during embedded PDF processing. The vulnerability can be exploited via a crafted PDF document opened by a local user, enabling arbitrary file writes outside intended directories and potential arbitrary code execution.

Affected products

Foxit PDF Reader 2026.2.0.39747 and earlier
Foxit PDF Editor 2026.2.0.39747 and all previous 2026.x versions, 2025.3.0.35737 and all previous 2025.x versions, 2024.4.1.27687 and all previous 2024.x versions, 2023.3.0.23028 and all previous 2023.x versions, 14.0.7.33751 and all previous 14.x versions, 13.2.6.24111 and earlier

Timeline

2026-09-23: disclosed
2026-09-23: patched: Fixed in Foxit PDF Reader 2026.2.1 and Foxit PDF Editor 2026.2.1/14.0.8

References

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

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