# CVE-2026-85898: Microsoft Edge type confusion vulnerability

Source: https://junglewise.ai/threats/cve-2026-85898-access-of-resource-using-incompatible-type-type-confusion-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-27. Updated: 2026-10-27  
License: CC BY 4.0 with a link back

CVE-2026-85898 · Severity: high · CVSS 8.8 · Published 2026-10-27

Microsoft Edge, a web browser, contains a type confusion flaw in its Chromium-based rendering engine that allows an attacker to execute code by sending a specially crafted web page. A user visiting a malicious website could have their system compromised, leading to data theft, malware installation, or complete system takeover.

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

## Quick answers

**Is CVE-2026-85898 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-85898 being exploited in the wild.

**How severe is CVE-2026-85898?** High severity, with a CVSS score of 8.8, published 27 October 2026.

**Which products and versions are affected?** Microsoft Edge.

**Is there a fix for CVE-2026-85898?** 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-2026-85898 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-85898?** Check whether you run Microsoft Edge. 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 type confusion vulnerability in Microsoft Edge's Chromium engine allows an attacker to treat a resource as an incompatible type, leading to code execution. The vulnerability is reachable over the network through a malicious web page without requiring user authentication beyond visiting the site. The flaw results in arbitrary code execution in the browser's security context.

## Affected products

- Microsoft Edge

## Timeline

- 2026-10-27: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85898](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85898)

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- [Microsoft Edge heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-96199-heap-based-buffer-overflow-in-microsoft-edge-chromium-based)
- [Microsoft Edge heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-96198-heap-based-buffer-overflow-in-microsoft-edge-chromium-based)