{"id":"CVE-2026-83831","kind":"vulnerability","aliases":["CVE-2026-83831"],"related":[],"title":"Microsoft Edge: double free lets a remote attacker run code","description":"Double free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.","summary":"A double free bug in the Chromium-based Microsoft Edge browser lets an unauthorized attacker run code over the network. The sources give no affected versions, fixed version or exploitation details.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","microsoft-edge","other","windows"],"not_affected_if":[],"how_to_check":"- unknown","fix":"- unknown","status":"open","published_at":"2026-10-27T21:19:08+00:00","first_seen_at":"2026-10-27T21:29:22+00:00","triaged_at":"2026-10-27T21:30:16+00:00","updated_at":"2026-10-27T21:30:16+00:00","category":"other","confidence":0.5,"triage":{"at":"2026-10-27T21:30:16Z","model":"claude-haiku-5-5","output":{"fix":"- unknown","reach":"internet","title":"Microsoft Edge: double free lets a remote attacker run code","impact":"high","summary":"A double free bug in the Chromium-based Microsoft Edge browser lets an unauthorized attacker run code over the network. The sources give no affected versions, fixed version or exploitation details.","category":"other","nicknames":[],"who_cares":["microsoft-edge","windows","browser"],"confidence":0.5,"needs_auth":"no","worst_case":"Attacker runs code on the victim's machine over the network","analyst_note":"Find the affected Edge versions and fixed build in the Microsoft advisory for CVE-2026-83831; confirm whether user interaction is needed.","how_to_check":"- unknown","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000491,"input_tokens":3256,"output_tokens":331,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-2026':12A,15A '-83831':13A,16A 'affect':48B 'allow':63C 'attack':8A,38B,66C 'base':31B,62C 'browser':17B,34B 'bug':26B 'chromium':30B,61C 'chromium-bas':29B,60C 'code':10A,40B,69C 'cve':11A,14A 'detail':54B 'doubl':3A,24B,55C 'edg':2A,20B,33B,59C 'execut':68C 'exploit':53B 'fix':50B 'free':4A,25B,56C 'give':46B 'let':5A,35B 'microsoft':1A,19B,32B,58C 'microsoft-edg':18B 'network':43B,72C 'remot':7A 'run':9A,39B 'sourc':45B 'unauthor':37B,65C 'version':49B,51B 'window':22B","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T21:19:08+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-2026-83831","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-83831","severity":null,"published_at":"2026-10-27T21:19:08+00:00","modified_at":"2026-10-27T21:19:08+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"}