CVE-2026-96396
Medium
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.
SeverityMedium
CVSS4.9
Exploit probability—
Product
Canva Affinity
PublishedOct 9, 2026
First seenOct 9, 2026
Weakness typeCWE-122CWE-122
How to fix
Update
- canva affinity3.3.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| canva affinity | v < 3.3.1 | 3.3.1 |
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