Medium severity · published Oct 9, 2026
CVE-2026-96396
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…
4.9
CVSS
0.1%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack vector
Local
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 1% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AF
affinity · canva
before 3.3.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-96396
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-96396
trust.canva.com
https://trust.canva.com?tcuUid=1998378a-9134-47e9-b761-7a49d5fd6bfb
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