---
id: CVE-2026-96394
title: >-
  The Affinity by Canva application for macOS before 3.3.1 (October 2026
  release) did not validate image dimensions against the size of the pixel data
  when generating QuickLook thumbnails and previews of Affinity document files,
  leading to…
summary: >-
  The Affinity by Canva application for macOS before 3.3.1 (October 2026
  release) did not validate image dimensions against the size of the pixel data
  when generating QuickLook thumbnails and previews of Affinity document files,
  leading to…
severity: low
cvss: 2.9
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-126
published: '2026-10-09'
updated: '2026-10-09'
sourceUpdated: '2026-10-09T17:16:51.197'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-96394'
references:
  - url: 'https://trust.canva.com?tcuUid=1998378a-9134-47e9-b761-7a49d5fd6bfb'
    label: 61adb53e-e4b3-47f7-8a93-4717c9e77dc6
tags:
  - nvd
ingestedAt: '2026-10-09T13:58:52.548Z'
---

## Overview

The Affinity by Canva application for macOS before 3.3.1 (October 2026 release) did not validate image dimensions against the size of the pixel data when generating QuickLook thumbnails and previews of Affinity document files, leading to an out-of-bounds heap read. A threat actor could craft an Affinity document that, when displayed or previewed by a user in Finder, could disclose the contents of adjacent heap memory in the rendered thumbnail or preview image, or cause the thumbnail or preview extension to crash.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.