{"id":"CVE-2026-121665","kind":"vulnerability","aliases":["CVE-2026-121665"],"related":[],"title":"Visual Studio Code: trust boundary flaw lets attacker bypass a security feature","description":"Trust boundary violation in Visual Studio Code allows an unauthorized attacker to bypass a security feature over a network.","summary":"Visual Studio Code has a trust boundary violation that lets an unauthorized attacker bypass a security feature over the network. The sources do not describe the specific feature or what the attacker gets beyond the bypass.","severity":"high","cvss":8.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["linux","macos","other","vscode","windows"],"not_affected_if":[],"how_to_check":"- Check your installed Visual Studio Code version with `code --version` and compare it with the fixed release in Microsoft's advisory.","fix":"- Visual Studio Code: unknown","status":"open","published_at":"2026-11-10T19:20:30+00:00","first_seen_at":"2026-11-10T19:25:08+00:00","triaged_at":"2026-11-10T19:27:46+00:00","updated_at":"2026-11-10T19:27:46+00:00","category":"other","confidence":0.4,"triage":{"at":"2026-11-10T19:27:46Z","model":"claude-haiku-5-5","output":{"fix":"- Visual Studio Code: unknown\n- unknown","reach":"network","title":"Visual Studio Code: trust boundary flaw lets attacker bypass a security feature","impact":"medium","summary":"Visual Studio Code has a trust boundary violation that lets an unauthorized attacker bypass a security feature over the network. The sources do not describe the specific feature or what the attacker gets beyond the bypass.","audience":"developers","category":"other","nicknames":[],"who_cares":["vscode","windows","macos","linux"],"confidence":0.4,"fix_status":"unknown","needs_auth":"unknown","worst_case":"Security feature bypassed; further impact unknown","analyst_note":"Find the Microsoft Security Response Center advisory for CVE-2026-121665 to confirm the bypassed feature, required conditions and fixed version.","how_to_check":"- Check your installed Visual Studio Code version with `code --version` and compare it with the fixed release in Microsoft's advisory.\n- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000665,"input_tokens":4494,"output_tokens":431,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-121665':15A,18A '-2026':14A,17A 'allow':67C 'attack':8A,36B,55B,70C 'beyond':57B 'boundari':5A,30B,61C 'bypass':9A,37B,59B,72C 'code':3A,26B,66C 'cve':13A,16A 'describ':48B 'featur':12A,40B,51B,75C 'flaw':6A 'get':56B 'let':7A,33B 'linux':19B 'maco':20B 'network':43B,78C 'secur':11A,39B,74C 'sourc':45B 'specif':50B 'studio':2A,25B,65C 'trust':4A,29B,60C 'unauthor':35B,69C 'violat':31B,62C 'visual':1A,24B,64C 'vscode':22B 'window':23B","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"unknown","audience":"developers","plain_action":null,"pkeys":[],"ptokens":[],"labels":["high","linux","macos","other","vscode","windows"],"campaign_type":null,"search_a":"'-121665':15A,18A '-2026':14A,17A 'attack':8A 'boundari':5A 'bypass':9A 'code':3A 'cve':13A,16A 'featur':12A 'flaw':6A 'let':7A 'secur':11A 'studio':2A 'trust':4A 'visual':1A","search_b":"'attack':36B,55B 'beyond':57B 'boundari':30B 'bypass':37B,59B 'code':26B 'describ':48B 'featur':40B,51B 'get':56B 'let':33B 'linux':19B 'maco':20B 'network':43B 'secur':39B 'sourc':45B 'specif':50B 'studio':25B 'trust':29B 'unauthor':35B 'violat':31B 'visual':24B 'vscode':22B 'window':23B","search_c":"'allow':67C 'attack':70C 'boundari':61C 'bypass':72C 'code':66C 'featur':75C 'network':78C 'secur':74C 'studio':65C 'trust':60C 'unauthor':69C 'violat':62C 'visual':64C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T19:20:30+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L","cvss_by":"secure@microsoft.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121665","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121665","severity":null,"published_at":"2026-11-10T19:20:30+00:00","modified_at":"2026-11-10T19:20:30+00:00","first_seen_at":"2026-11-10T19:25:08+00:00","fetched_at":"2026-11-10T19:25:08+00:00","note":null}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}