CVE-2026-85890: Microsoft Edge (Chromium-based) (High, CVSS 8.8)

CVE record · updated Oct 29, 2026

CVE-2026-85890HighMicrosoft Edge (Chromium-based)

CVSS: 8.8 High (v3.1)
Exploited in the wild: Not on CISA’s KEV list
Public exploit: None reported in public exploit databases
Weakness: CWE-415
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: Oct 29, 2026

What it is

Double free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

Description from the National Vulnerability Database.

What to do

Check whether you run Microsoft Edge (Chromium-based), then apply the vendor’s fix or mitigation from the advisories below.

Sources: NVD, FIRST EPSS, CISA KEV, and public exploit databases (availability only). ThreatRoundup reports whether public exploit code exists but never links to it: fake proof-of-concepts that infect security researchers are common. This page updates automatically.