# CVE-2026-70339: Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an…

Source: https://junglewise.ai/threats/cve-2026-70339-access-of-resource-using-incompatible-type-type-confusion-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-11  
License: CC BY 4.0 with a link back

CVE-2026-70339 · Severity: medium · CVSS 5.4 · Published 2026-08-11

Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

Technologies: [Microsoft Edge Chromium](https://junglewise.ai/threats/technologies/edge-chromium). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-70339 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-70339 being exploited in the wild.

**How severe is CVE-2026-70339?** Medium severity, with a CVSS score of 5.4, published 11 August 2026.

**Which products and versions are affected?** Microsoft Edge Chromium. The advisory does not name versions.

**Is there a fix for CVE-2026-70339?** 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.

**Am I affected by CVE-2026-70339?** Check whether you run Microsoft Edge Chromium. 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.

## Affected products

- Microsoft Edge Chromium

## Related threats

- [Microsoft Edge use after free privilege escalation](https://junglewise.ai/threats/cve-2026-88097-use-after-free-in-microsoft-edge-chromium-based-allows-an)
- [Microsoft Edge use-after-free in Chromium](https://junglewise.ai/threats/cve-2026-85893-microsoft-edge-use-after-free-in-chromium)
- [Microsoft Edge heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-69486-microsoft-edge-heap-based-buffer-overflow)
- [Microsoft Edge race condition in shared resource synchronization](https://junglewise.ai/threats/cve-2026-85892-microsoft-edge-race-condition-in-shared-resource-synchronization)
- [Microsoft Edge cross-site scripting in page generation](https://junglewise.ai/threats/cve-2026-77490-microsoft-edge-cross-site-scripting-in-page-generation)