CVE-2026-96394

Out-of-Bounds Heap Read in Affinity for macOS

Published Oct 9, 2026 CVSS 3.1 · 2.9 Low EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Title Out-of-Bounds Heap Read in Affinity for macOS
Type Values Removed Values Added
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.
First Time appeared Canva
Canva affinity
Weaknesses CWE-126
CPEs cpe:2.3:a:canva:affinity:*:*:*:*:*:macos:*:*
Vendors & Products Canva
Canva affinity
References
Metrics cvssV3_1

{'score': 2.9, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Canva
Published
Updated
Oct 9, 2026, 4:47 PM
Reserved
Sep 23, 2026, 1:53 AM
Status
Awaiting Analysis
Published
Oct 9, 2026, 1:17 PM
Modified
Oct 9, 2026, 5:16 PM