CVE-2026-20726
📋 TL;DR
An out-of-bounds read vulnerability in Canva Affinity's EMF file processing allows attackers to read memory beyond allocated buffers via specially crafted EMF files. This could lead to sensitive information disclosure. Users of affected Canva Affinity software are at risk.
💻 Affected Systems
- Canva Affinity
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Memory disclosure could expose sensitive data like credentials, encryption keys, or proprietary information from the application's memory space.
Likely Case
Limited information disclosure from application memory, potentially revealing non-critical data or causing application instability.
If Mitigated
With proper controls, impact is limited to application crashes or minimal data exposure without system compromise.
🎯 Exploit Status
Exploitation requires user interaction to open malicious EMF file; no authentication needed for file processing.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Canva Affinity updates for specific version
Vendor Advisory: https://trust.canva.com/?tcuUid=1f728b0d-17f3-4c9c-97e9-6662b769eb62
Restart Required: Yes
Instructions:
1. Open Canva Affinity application. 2. Check for updates in application settings or help menu. 3. Download and install latest version. 4. Restart application.
🔧 Temporary Workarounds
Disable EMF file processing
allPrevent application from processing EMF files by blocking file associations or using application controls.
User education and file filtering
allTrain users to avoid opening EMF files from untrusted sources and implement email/web filtering for EMF attachments.
🧯 If You Can't Patch
- Implement application whitelisting to prevent unauthorized execution of Canva Affinity
- Use network segmentation to isolate systems running vulnerable software
🔍 How to Verify
Check if Vulnerable:
Check Canva Affinity version against vendor advisory; if using unpatched version, assume vulnerable.Check Version:
Check version in Canva Affinity application settings or about dialog.Verify Fix Applied:
Verify Canva Affinity version matches or exceeds patched version specified in vendor advisory.📡 Detection & Monitoring
Log Indicators:
- Application crashes when processing EMF files
- Unusual memory access patterns in application logs
Network Indicators:
- Downloads of EMF files from untrusted sources
- Unusual file transfer activity
SIEM Query:
Search for Canva Affinity process crashes or EMF file processing errors in application logs.