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    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 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.

    Published:Oct 9, 2026
    Last Modified:Oct 9, 2026
    EPS:Oct 9, 2026
    EPSS Score:
    CVSS Score:4.9

    Affected Products

    Vendor
    Canva
    Product
    Affinity

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-122 Heap-based Buffer Overflow

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

    Related CVEs

    CVE-2026-103220 (CVSS 4.5) — The Affinity by Canva application before 3.3.1 (October 2026 release) did not perform adequate bounds checking…
    CVE-2026-101130 (CVSS 3.6) — The Affinity by Canva application before 3.3.1 (October 2026 release) did not perform adequate bounds checking…
    CVE-2026-101094 (CVSS 3.6) — The Affinity by Canva application before 3.3.1 (October 2026 release) did not correctly handle incomplete UTF-…
    CVE-2026-96395 (CVSS 3.6) — The Affinity by Canva app for macOS before 3.3.1 (October 2026 release) did not perform adequate bounds checki…
    CVE-2026-96394 (CVSS 2.9) — The Affinity by Canva application for macOS before 3.3.1 (October 2026 release) did not validate image dimensi…
    CVE-2026-96393 (CVSS 3.6) — The Affinity by Canva app before 3.3.1 (October 2026 release) did not perform adequate bounds checking when pa…
    CVE-2026-81546 (CVSS 7.7) — The Affinity by Canva application before 3.3.0 (September 2026 release) did not perform adequate bounds checki…
    CVE-2025-66342 (CVSS 7.8) — A type confusion vulnerability exists in the EMF functionality of Canva Affinity. A specially crafted EMF file…
    CVE-2025-62500 (CVSS 6.1) — An out-of-bounds read vulnerability exists in the EMF functionality of Canva Affinity. By using a specially cr…
    CVE-2025-61979 (CVSS 6.1) — An out-of-bounds read vulnerability exists in the EMF functionality of Canva Affinity. By using a specially cr…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High