CVE-2026-96394: CWE-126 Buffer Over-read in canva affinity
Description
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.
CVSS v3.1
Score 2.9low
Affected software
canva
affinity
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Canva
- Date Reserved
- 2026-09-23T01:53:44.051Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ac8e2bf2cdf04f6565578ee
Added to database: 10/09/2026, 12:49:03 UTC
Last updated: 10/09/2026, 12:49:03 UTC
Views: 1
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