CVE-2026-103220: CWE-129 Improper Validation of Array Index in canva affinity
Description
The Affinity by Canva application before 3.3.1 (October 2026 release) did not perform adequate bounds checking when parsing raster image data in Affinity document files, leading to an out-of-bounds read and the dereference of an untrusted pointer. A threat actor could craft an Affinity document that, when opened by a user in Affinity, could result in memory corruption or an application crash.
CVSS v3.1
Score 4.5medium
Affected software
canva
affinity
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-103220 is a vulnerability in Affinity by Canva prior to version 3.3.1 where inadequate bounds checking occurs during the parsing of raster image data within Affinity document files. This improper validation of array indexes (CWE-129) can result in an out-of-bounds read and dereference of untrusted pointers. Exploitation requires a user to open a maliciously crafted Affinity document, which may cause memory corruption or crash the application.
Potential Impact
Successful exploitation may lead to memory corruption or application crashes, impacting availability and potentially confidentiality and integrity to a limited extent. The CVSS score of 4.5 (medium severity) reflects that exploitation requires local access with high attack complexity and user interaction, and results in limited confidentiality, integrity, and availability impacts.
Mitigation Recommendations
A fix is available in Affinity by Canva version 3.3.1 released in October 2026. Users should upgrade to version 3.3.1 or later to remediate this vulnerability. No additional mitigation guidance is provided or required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Canva
- Date Reserved
- 2026-09-30T06:54:43.917Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ac8e6472cdf04f65657df2f
Added to database: 10/09/2026, 13:04:07 UTC
Last enriched: 10/09/2026, 13:18:43 UTC
Last updated: 10/09/2026, 18:57:32 UTC
Views: 17
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