---
title: "CVE-2026-91794: Foxit PDF Editor/Reader - Out-of-Bounds Write"
description: "Foxit PDF Editor/Reader contains an out-of-bounds write vulnerability caused by insufficient boundary validation in the PDF rendering process when handling malformed color space data, letting remote attackers cause crashes and potentially execute code."
url: https://panop.io/threat-heartbeat/CVE-2026-91794/
---

# CVE-2026-91794 Foxit PDF Editor/Reader - Out-of-Bounds Write

Foxit PDF Editor/Reader contains an out-of-bounds write vulnerability caused by insufficient boundary validation in the PDF rendering process when handling malformed color space data, letting remote attackers cause crashes and potentially execute code.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.16% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-91794)

## Details

Type

Out-of-Bounds Write

Impact

Remote Code Execution, Denial Of Service

CVSS vector

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

Published

23 September 2026

Updated

15 October 2026

Weakness

[CWE-787](https://cwe.mitre.org/data/definitions/787.html)

## Vendor fix

Update to the latest version of Foxit PDF Editor/Reader.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-91794](https://nvd.nist.gov/vuln/detail/CVE-2026-91794)
- [https://www.foxit.com/support/security-bulletins.html](https://www.foxit.com/support/security-bulletins.html)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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