TI-2026-69991 Aliases CVE-2026-96396 GHSA-cxqf-wmjh-f84m

Heap-based buffer overflow in Affinity by Canva QuickLook previews

LOW 21CWE-122Published 2026-10-09 · Updated 2026-10-09

Key facts

Attack vector: Local
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: —
Confidentiality · integrity · availability: Low · Low · Low
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

The Affinity by Canva application for macOS before 3.3.1 (October 2026 release) does not safely calculate the size of an image buffer when generating QuickLook thumbnails and previews of Affinity documents. This leads to an integer overflow and a heap-based buffer overflow (CWE-122). A threat actor can craft a document that, when displayed or previewed by a user in Finder, corrupts heap memory and crashes the thumbnail or preview extension.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00096 0th percentileScored 2026-11-07

Fix Fixed affinity (canva): 3.3.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Canva	affinity	before 3.3.1	3.3.1	Patch available	CNA

affinity VendorCanva Affected before 3.3.1 Fixed in 3.3.1 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:canva:affinity::::::::	—	—	Canva

cpe:2.3:a:canva:affinity:*:*:*:*:*:*:*:* Versions — — ·Canva

Remediation

Update Affinity by Canva for macOS to version 3.3.1 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Fix · CNA affinity (canva) Fixed in 3.3.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-10-09
canva affinity 3.3.1
7 records Highest priority Priority LOW 7 LOW
Other records, highest priority first
- TI-2026-70020 Out-of-bounds read in Affinity by Canva raster image parsingPriority LOW 19
- TI-2026-70019 Heap buffer over-read in Affinity by Canva when parsing document filesPriority LOW 16
- TI-2026-69992 Heap buffer over-read in Affinity by Canva when parsing document textPriority LOW 16
Show all 7 records →

Timeline

2026-10-09 Threatist record created from CVE-2026-96396
2026-10-09 Alias added: GHSA-cxqf-wmjh-f84m
2026-10-10 CISA SSVC decision points changed

References

Other 1

https://trust.canva.com?tcuUid=1998378a-9134-47e9-b761-7a49d5fd6bfb

TI-2026-82266 Ortto WordPress plugin missing authentication on config updates CVSS 3.1HIGH 8.6
TI-2026-58447 Improper verification of communication channel in Canva CVSS 3.1CRITICAL 9.6
TI-2026-58453 The Canva Android App before 2.376.0 did not restrict the headers returned to an external… CVSS 3.1HIGH 8.8
TI-2025-40808 Type confusion in Canva Affinity CVSS 3.1HIGH 7.8
TI-2025-39740 Out-of-bounds write in Canva Affinity CVSS 3.1HIGH 7.8
TI-2026-56261 Stack-based buffer overflow in Canva Affinity CVSS 3.1HIGH 7.7

See all 35 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences