{"id":"CVE-2026-121082","kind":"vulnerability","aliases":["CVE-2026-121082"],"related":[],"title":"Chrome: V8 type confusion lets a crafted web page run code","description":"Type confusion in V8 in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)","summary":"A type confusion bug in the V8 JavaScript engine of Google Chrome lets a remote attacker run arbitrary code inside the browser sandbox when the victim opens a crafted HTML page. Chromium rates it High severity; the sources do not say whether it is exploited in the wild.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","end-users","runtime","v8"],"not_affected_if":["chrome-157-or-later"],"how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `chrome --version` on the command line.\n- Confirm the installed version is at or above `157.0.8103.38`.","fix":"- Google Chrome: move to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:13+00:00","first_seen_at":"2026-11-03T21:19:12+00:00","triaged_at":"2026-11-03T21:26:45+00:00","updated_at":"2026-11-03T21:26:45+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-11-03T21:26:45Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later.","reach":"internet","title":"Chrome: V8 type confusion lets a crafted web page run code","impact":"high","summary":"A type confusion bug in the V8 JavaScript engine of Google Chrome lets a remote attacker run arbitrary code inside the browser sandbox when the victim opens a crafted HTML page. Chromium rates it High severity; the sources do not say whether it is exploited in the wild.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browser","v8","desktop","end-users"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"Attacker runs code inside the browser sandbox on the victim's machine.","analyst_note":"","how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `chrome --version` on the command line.\n- Confirm the installed version is at or above `157.0.8103.38`.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later.","needs_analyst":false,"not_affected_if":["chrome-157-or-later"],"who_is_affected":"Any device running Google Chrome before 157.0.8103.38 is exposed when a user visits a malicious web page. The flaw sits in the browser's JavaScript engine, so it reaches any user who browses to attacker-controlled content, with no account needed. Chromium-based browsers that bundle V8 may also be affected, but the sources do not say which.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000695,"input_tokens":4103,"output_tokens":569,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121082':14A,17A '-2026':13A,16A '157.0.8103.38':83C 'allow':84C 'arbitrari':43B,90C 'attack':41B,87C 'browser':18B,47B 'bug':29B 'chrome':1A,19B,37B,80C 'chromium':57B,100C 'code':11A,44B,91C 'confus':4A,28B,75C 'craft':7A,54B,97C 'cve':12A,15A 'desktop':20B 'end':22B 'end-us':21B 'engin':34B 'execut':89C 'exploit':70B 'googl':36B,79C 'high':60B,103C 'html':55B,98C 'insid':45B,92C 'javascript':33B 'let':5A,38B 'open':52B 'page':9A,56B,99C 'prior':81C 'rate':58B 'remot':40B,86C 'run':10A,42B 'runtim':24B 'sandbox':48B,94C 'say':66B 'secur':101C 'sever':61B,102C 'sourc':63B 'type':3A,27B,74C 'user':23B 'v8':2A,25B,32B,77C 'via':95C 'victim':51B 'web':8A 'whether':67B 'wild':73B","nicknames":[],"mitigations":[],"who_affected":"Any device running Google Chrome before 157.0.8103.38 is exposed when a user visits a malicious web page. The flaw sits in the browser's JavaScript engine, so it reaches any user who browses to attacker-controlled content, with no account needed. Chromium-based browsers that bundle V8 may also be affected, but the sources do not say which.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Google Chrome to version 157.0.8103.38 or later.","pkeys":[],"ptokens":[],"labels":["browser","chrome","desktop","endusers","high","runtime","v8"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:13+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121082","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121082","severity":null,"published_at":"2026-11-03T21:17:13+00:00","modified_at":"2026-11-03T21:17:13+00:00","first_seen_at":"2026-11-03T21:19:12+00:00","fetched_at":"2026-11-03T21:19:12+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"}