{"id":"CVE-2026-121228","kind":"vulnerability","aliases":["CVE-2026-121228"],"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 V8, the JavaScript engine in Google Chrome, lets a remote attacker run arbitrary code inside the browser sandbox by getting the victim to open a crafted HTML page. Chromium rates it High severity.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","chromium","other","v8"],"not_affected_if":["chrome-updated","non-chromium-browser"],"how_to_check":"- Check the Chrome version under Chrome menu > Help > About Google Chrome, or run `chrome://version` in the address bar.\n- Compare the installed version against `157.0.8103.38`; anything older is in the affected range.","fix":"- Google Chrome: update to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:32+00:00","first_seen_at":"2026-11-03T21:19:28+00:00","triaged_at":"2026-11-03T21:21:21+00:00","updated_at":"2026-11-03T21:21:21+00:00","category":"other","confidence":0.8,"triage":{"at":"2026-11-03T21:21:21Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: update 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 V8, the JavaScript engine in Google Chrome, lets a remote attacker run arbitrary code inside the browser sandbox by getting the victim to open a crafted HTML page. Chromium rates it High severity.","audience":"everyone","category":"other","nicknames":[],"who_cares":["chrome","chromium","browsers","v8"],"confidence":0.8,"fix_status":"available","needs_auth":"no","worst_case":"Attacker runs code inside the browser sandbox after a page visit","analyst_note":"","how_to_check":"- Check the Chrome version under Chrome menu > Help > About Google Chrome, or run `chrome://version` in the address bar.\n- Compare the installed version against `157.0.8103.38`; anything older is in the affected range.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later, then restart the browser.","needs_analyst":false,"not_affected_if":["chrome-updated","non-chromium-browser"],"who_is_affected":"Any device running Google Chrome before 157.0.8103.38 is exposed when a user visits a malicious or compromised web page. Users who do not run Chrome, or who run a patched build, can skip it. Chromium-based browsers that pick up the V8 fix in their own releases are exposed until they update.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000688,"input_tokens":4103,"output_tokens":556,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121228':14A,17A '-2026':13A,16A '157.0.8103.38':70C 'allow':71C 'arbitrari':40B,77C 'attack':38B,74C 'browser':18B,44B 'bug':26B 'chrome':1A,19B,34B,67C 'chromium':20B,56B,87C 'code':11A,41B,78C 'confus':4A,25B,62C 'craft':7A,53B,84C 'cve':12A,15A 'engin':31B 'execut':76C 'get':47B 'googl':33B,66C 'high':59B,90C 'html':54B,85C 'insid':42B,79C 'javascript':30B 'let':5A,35B 'open':51B 'page':9A,55B,86C 'prior':68C 'rate':57B 'remot':37B,73C 'run':10A,39B 'sandbox':45B,81C 'secur':88C 'sever':60B,89C 'type':3A,24B,61C 'v8':2A,22B,28B,64C 'via':82C 'victim':49B 'web':8A","nicknames":[],"mitigations":[],"who_affected":"Any device running Google Chrome before 157.0.8103.38 is exposed when a user visits a malicious or compromised web page. Users who do not run Chrome, or who run a patched build, can skip it. Chromium-based browsers that pick up the V8 fix in their own releases are exposed until they update.","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, then restart the browser.","pkeys":[],"ptokens":[],"labels":["browsers","chrome","chromium","high","other","v8"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:32+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121228","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121228","severity":null,"published_at":"2026-11-03T21:17:32+00:00","modified_at":"2026-11-03T21:17:32+00:00","first_seen_at":"2026-11-03T21:19:28+00:00","fetched_at":"2026-11-03T21:19:28+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"}