{"id":"CVE-2026-85898","kind":"vulnerability","aliases":["CVE-2026-85898"],"related":[],"title":"Microsoft Edge: type confusion lets a network attacker run code","description":"Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.","summary":"Microsoft Edge (Chromium-based) mishandles a resource of an incompatible type, a type confusion flaw. An unauthorized attacker can execute code on the machine over the network.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","edge","package","windows"],"not_affected_if":["patched-edge-version"],"how_to_check":"- Check the installed Edge version in edge://settings/help and compare it with the fixed release in the vendor advisory\n- unknown","fix":"- Update Microsoft Edge to the latest stable release via edge://settings/help or the managed update channel\n- unknown","status":"open","published_at":"2026-10-27T21:19:34+00:00","first_seen_at":"2026-10-27T21:29:22+00:00","triaged_at":"2026-10-27T21:30:17+00:00","updated_at":"2026-10-27T21:30:17+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-27T21:30:17Z","model":"claude-haiku-5-5","output":{"fix":"- Update Microsoft Edge to the latest stable release via edge://settings/help or the managed update channel\n- unknown","reach":"network","title":"Microsoft Edge: type confusion lets a network attacker run code","impact":"high","summary":"Microsoft Edge (Chromium-based) mishandles a resource of an incompatible type, a type confusion flaw. An unauthorized attacker can execute code on the machine over the network.","category":"package","nicknames":[],"who_cares":["edge","windows","browser"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker runs code on the machine over the network","analyst_note":"Find the affected and fixed Edge versions and whether user interaction is required in the Microsoft MSRC entry for CVE-2026-85898.","how_to_check":"- Check the installed Edge version in edge://settings/help and compare it with the fixed release in the vendor advisory\n- unknown","needs_analyst":true,"not_affected_if":["patched-edge-version"],"who_is_affected":"Teams whose staff or managed machines run a Chromium-based Microsoft Edge build older than the fix. Affected versions are not listed in the source text. Servers and CI runners that do not run a desktop browser are unlikely to be relevant. unknown","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000567,"input_tokens":3272,"output_tokens":480,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-2026':12A,15A '-85898':13A,16A 'access':49C 'allow':63C 'attack':8A,39B,66C 'base':25B,62C 'browser':17B 'chromium':24B,61C 'chromium-bas':23B,60C 'code':10A,42B,69C 'confus':4A,35B,56C 'cve':11A,14A 'edg':2A,18B,22B,59C 'execut':41B,68C 'flaw':36B 'incompat':31B,53C 'let':5A 'machin':45B 'microsoft':1A,21B,58C 'mishandl':26B 'network':7A,48B,72C 'packag':19B 'resourc':28B,51C 'run':9A 'type':3A,32B,34B,54C,55C 'unauthor':38B,65C 'use':52C 'window':20B","nicknames":[],"mitigations":[],"who_affected":"Teams whose staff or managed machines run a Chromium-based Microsoft Edge build older than the fix. Affected versions are not listed in the source text. Servers and CI runners that do not run a desktop browser are unlikely to be relevant. unknown","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T21:19:34+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-85898","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-85898","severity":null,"published_at":"2026-10-27T21:19:34+00:00","modified_at":"2026-10-27T21:19:34+00:00","first_seen_at":"2026-10-27T21:29:22+00:00","fetched_at":"2026-10-27T21:29:22+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}