# CVE-2026-90860: Canva Mobile App for HarmonyOS header restriction bypass in WebView

Source: https://junglewise.ai/threats/cve-2026-90860-the-canva-mobile-app-for-harmonyos-before-v1-15-1-did-not  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-21. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-90860 · Severity: high · CVSS 7.1 · Published 2026-09-21

The Canva mobile app for HarmonyOS versions before 1.15.1 failed to restrict HTTP headers returned to external origins within a privileged WebView component. An attacker with control of the WebView could exploit this to steal session credentials and hijack a user's account, gaining unauthorized access to their design files and account data.

Vendors: [Canva](https://junglewise.ai/threats/vendors/canva).

## Quick answers

**Is CVE-2026-90860 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-90860 being exploited in the wild.

**How severe is CVE-2026-90860?** High severity, with a CVSS score of 7.1, published 21 September 2026.

**Which products and versions are affected?** Canva Mobile App for HarmonyOS before 1.15.1.

**Is there a fix for CVE-2026-90860?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-90860 attacked?** It is attacked from the adjacent network or with local access, in a web application.

**Am I affected by CVE-2026-90860?** Check whether you run Canva Mobile App for HarmonyOS 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

A header restriction bypass vulnerability in the Canva HarmonyOS app's WebView allows an attacker controlling the WebView to read sensitive response headers—including session tokens—from cross-origin requests. The vulnerability requires the attacker to control the WebView context, a precondition that could be met through other compromises. No authentication bypass is required once this control is established; the impact is full session compromise.

## Affected products

- Canva Mobile App for HarmonyOS before 1.15.1

## Timeline

- 2026-09-21: disclosed

## References

- [https://trust.canva.com/?tcuUid=c17214e0-e758-4472-8238-abeb79faff07](https://trust.canva.com/?tcuUid=c17214e0-e758-4472-8238-abeb79faff07)