# CVE-2026-81546: Affinity by Canva stack buffer overflow in document parsing

Source: https://junglewise.ai/threats/cve-2026-81546-affinity-by-canva-stack-buffer-overflow-in-document-parsing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-17. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-81546 · Severity: high · CVSS 7.7 · Published 2026-09-17

Affinity by Canva is a design and content creation application used by millions of users worldwide. A vulnerability in document parsing allows an attacker to craft a malicious Affinity document that, when opened by a user, could execute arbitrary code on their system. This poses a direct risk to user data, system integrity, and could lead to complete system compromise.

Technologies: [Canva Affinity](https://junglewise.ai/threats/technologies/affinity). Vendors: [Canva](https://junglewise.ai/threats/vendors/canva).

## Quick answers

**Is CVE-2026-81546 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-81546 being exploited in the wild.

**How severe is CVE-2026-81546?** High severity, with a CVSS score of 7.7, published 17 September 2026.

**Which products and versions are affected?** Canva Affinity before 3.3.0.

**Is there a fix for CVE-2026-81546?** A patch was published on 2026-09: version 3.3.0 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-81546 attacked?** It is attacked with local access, in a web application.

**Am I affected by CVE-2026-81546?** Check whether you run Canva Affinity at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a stack-based buffer overflow caused by inadequate bounds checking when parsing Affinity document files. The affected component is the document file parser. The attack vector is user interaction: a threat actor must craft a malicious Affinity document and trick a user into opening it. Upon opening a crafted document in Affinity before version 3.3.0, the overflow occurs and an attacker can achieve arbitrary code execution with the privileges of the user running the application. The vulnerability is patched in Affinity version 3.3.0 (September 2026 release).

## Affected products

- Canva Affinity before 3.3.0

## Timeline

- 2026-09-17: disclosed
- 2026-09: patched: version 3.3.0 released

## References

- [https://trust.canva.com/?tcuUid=43596908-8a36-4a18-b2e7-5c99b67ab38a](https://trust.canva.com/?tcuUid=43596908-8a36-4a18-b2e7-5c99b67ab38a)

## Related threats

- [Affinity by Canva integer overflow in QuickLook thumbnail generation](https://junglewise.ai/threats/cve-2026-96396-the-affinity-by-canva-application-for-macos-before-3-3-1-october)
- [Affinity by Canva out-of-bounds read in raster image parsing](https://junglewise.ai/threats/cve-2026-103220-the-affinity-by-canva-application-before-3-3-1-october-2026)