# CVE-2026-91794: Foxit PDF Editor out-of-bounds write in color space processing

Source: https://junglewise.ai/threats/cve-2026-91794-an-out-of-bounds-write-vulnerability-exists-in-the-pdf-rendering  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-23. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-91794 · Severity: high · CVSS 7.8 · Published 2026-09-23

Foxit PDF Editor and Reader are widely used tools for viewing and editing PDF documents in corporate and personal environments. A flaw in how these applications process color space data in PDFs allows an attacker to craft a malicious document that, when opened, can crash the application or potentially execute arbitrary code on the victim's computer. An attacker could distribute such a document via email or a website to compromise user systems.

Technologies: [Foxit PDF Editor](https://junglewise.ai/threats/technologies/pdf-editor), [Foxit PDF Reader](https://junglewise.ai/threats/technologies/pdf-reader). Vendors: [Foxit](https://junglewise.ai/threats/vendors/foxit).

## Quick answers

**Is CVE-2026-91794 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-91794 being exploited in the wild.

**How severe is CVE-2026-91794?** 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-2026-91794?** 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-2026-91794 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-91794?** 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

An out-of-bounds write vulnerability (CWE-787) exists in the PDF rendering engine due to insufficient validation of color space data structures. The vulnerability is triggered when processing malformed color space entries during PDF parsing and rendering. An attacker can exploit this by crafting a specially crafted PDF document and requiring user interaction (opening the file); no authentication or network access is required.

## 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: CVE-2026-91794 published
- 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](https://www.foxit.com/support/security-bulletins.html)

## Related threats

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