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2.9

Affinity for macOS can expose data or crash on preview

CVE-2026-96394 · published 9 days ago
Summary

Versions of Affinity for macOS released before 3.3.1 do not correctly check the size of images when they create thumbnail previews in Finder. A specially crafted Affinity file could cause the preview to read unintended memory, potentially showing other information or causing the preview to stop working. Update the app to version 3.3.1 or later, and avoid opening untrusted Affinity files until you have updated.

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 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 preview...
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.
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
2.9 Low
Exploitation
<1% chance of attack within 30 days
Type
CWE-126Buffer Over-read
Timeline
Published9 Oct 2026
Updated11 Oct 2026
First seen9 Oct 2026
Sources
CVE-2026-96394 · NVD
CVE-2026-96394 · MITRE
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