CVE-2026-81546: Buffer Overflow
The Affinity by Canva application before 3.3.0 (September 2026 release) did not perform adequate bounds checking when parsing Affinity document files leading to a stack-based buffer overflow. A threat actor could craft a Affinity document that when opened by a user in Affinity could result in arbitrary code execution.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Affinity by Canvato a version that resolves this vulnerability.Fixed in 3.3.0 - Compensating control
Prevent Affinity documents from being opened by untrusted users/sources (e.g., restrict receipt/opening of Affinity (.affinity) files via email/download controls) until systems are upgraded to Affinity by Canva 3.3.0.
Event History
Frequently Asked Questions
What does an attacker need to exploit this issue?
An attacker must craft a malicious Affinity document file and persuade a user to open it in the affected application. The vulnerability is locally exploitable and requires user interaction.
Which installations are affected?
Canva Affinity versions before 3.3.0 are affected. Version 3.3.0, identified as the September 2026 release, is the stated fixed version.
What is the impact if exploitation succeeds?
Opening the crafted document can trigger a stack-based buffer overflow and may allow arbitrary code execution. The reported impact includes high confidentiality, integrity, and availability consequences.