CVE-2026-96396CWE-122

CVE-2026-96396

Medium · published October 9, 2026

CVSS v3.1
4.9
EPSS
0%
Percentile
2.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.9 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00128 · 2.2th percentile
Weakness
CWE-122 · Heap-based Buffer Overflow
Published
2026-10-09T17:17Z
References (1)
https://trust.canva.com?tcuUid=1998378a-9134-47e9-b761-7a49d5fd6bfb · 61adb53e-e4b3-47f7-8a93-4717c9e77dc6
EPSS history
Timeline
  • 11 OCT 03:33Z
    EPSS moved — → 0%
    epss
  • 09 OCT 12:43Z
    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…
    cvelistv5
  • 09 OCT 12:43Z
    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…
    cvelistv5