Out-of-Bounds Read in Affinity by Canva app for macOS (CVE-2026-96395)
Summary
Vulnerability in Affinity by Canva app for macOS (CVE-2026-96395). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
The Affinity by Canva app for macOS before 3.3.1 (October 2026 release) did not perform adequate bounds checking 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, including memory addresses, in the rendered thumbnail or preview image.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-96395 has been found in Affinity by Canva app for macOS.
Risk of unauthorized operations or information disclosure. CVSS score: 3.6/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Affinity by Canva app for macOS CVE-2026-96395" on the vendor's site.
CVE-2026-96395 (Affinity by Canva app for macOS) — CWE-125 / CVSS v3 3.6
Attack vector: local / unauthenticated
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Out-of-bounds read (CWE-125) exists in Affinity by Canva app for macOS.
Check the vendor advisory for the affected versions of Affinity by Canva app for macOS.
Severity: Low (CVSS 3.6/10). Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Affinity by Canva app for macOS を使っているサービスとバージョンを洗い出す。
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2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- web trust.canva.com
- web nvd.nist.gov
- web github.com