What is CVE-2026-85898?

CVE-2026-85898 is a high-severity vulnerability in Microsoft Edge (Chromium-Based), classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 8.8/10. Published 2026-10-27.

How severe is CVE-2026-85898?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Microsoft Edge (Chromium-Based)

CVE-2026-85898

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

Published 2026-10-27 · last modified 2026-10-27.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Microsoft Edge (Chromium-Based)

Weakness classification (CWE)

CWE-843 — Access of Resource Using Incompatible Type (Type Confusion)

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85898 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-85898?: CVE-2026-85898 is a high-severity vulnerability in Microsoft Edge (Chromium-Based), classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 8.8/10. Published 2026-10-27.
How severe is CVE-2026-85898?: High severity. CVSS v3 base score is 8.8 out of 10.