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3.6

Canva Affinity for Mac may reveal hidden data in thumbnails

CVE-2026-96395 · published 9 days ago
Summary

Older versions of the Canva Affinity app for macOS create thumbnail and preview images for Affinity documents without fully checking the data they read. A crafted document could cause the app to expose bits of the computer’s internal memory in the preview image. Install the October 2026 release (version 3.3.1) or later, and avoid opening files from unknown sources.

What to do
  • Update canva affinity to version 3.3.1 or later.
Affected software
VendorProductAffected versions
canva affinity < 3.3.1
Original advisory text
The Affinity by Canva app for macOS before 3.3.1 (October 2026 release) did not perform adequate bounds checking when generating QuickLook thumbnails and previews of Affinity document files, leadin...
The Affinity by Canva app for macOS before 3.3.1 (October 2026 release) did not perform adequate bounds checking 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, including memory addresses, in the rendered thumbnail or preview image.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
3.6 Low
Exploitation
<1% chance of attack within 30 days
Type
CWE-125Out-of-bounds Read
Timeline
Published9 Oct 2026
Updated11 Oct 2026
First seen9 Oct 2026
Sources
CVE-2026-96395 · NVD
CVE-2026-96395 · MITRE
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