CVE-2026-96396: CWE-122 Heap-based Buffer Overflow in canva affinity
Description
The Affinity by Canva application for macOS before 3.3.1 (October 2026 release) did not safely calculate the size of an image buffer when generating QuickLook thumbnails and previews of Affinity document files, leading to an integer overflow and a heap-based buffer overflow. A threat actor could craft an Affinity document that, when displayed or previewed by a user in Finder, could corrupt heap memory and cause the thumbnail or preview extension to crash.
CVSS v3.1
Score 4.9medium
Affected software
canva
affinity
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Canva
- Date Reserved
- 2026-09-23T01:54:28.750Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ac8e2bf2cdf04f6565578f0
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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