{"id":"CVE-2026-121210","kind":"vulnerability","aliases":["CVE-2026-121210"],"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 a victim opens 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","runtime","v8"],"not_affected_if":["chrome-at-or-above-157.0.8103.38"],"how_to_check":"- Open Chrome's About page (chrome://settings/help) and read the version number\n- Check whether the installed Chrome version is below `157.0.8103.38`","fix":"- Google Chrome: move to `157.0.8103.38` or later","status":"open","published_at":"2026-11-03T21:17:30+00:00","first_seen_at":"2026-11-03T21:19:26+00:00","triaged_at":"2026-11-03T21:22:41+00:00","updated_at":"2026-11-03T21:22:41+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-11-03T21:22:41Z","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 a victim opens a crafted HTML page. Chromium rates it High severity.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browsers","v8"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"Attacker runs code inside the browser sandbox after a visit","analyst_note":"","how_to_check":"- Open Chrome's About page (chrome://settings/help) and read the version number\n- Check whether the installed Chrome version is below `157.0.8103.38`","plain_action":"Update Google Chrome to version 157.0.8103.38 or later.","needs_analyst":false,"not_affected_if":["chrome-at-or-above-157.0.8103.38"],"who_is_affected":"Anyone running Google Chrome older than 157.0.8103.38 on desktop or mobile is exposed when visiting a malicious or compromised web page. Chromium-based browsers that embed the same V8 engine may also be affected until they ship their own update. Teams can skip this for servers that do not browse the web with Chrome.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000675,"input_tokens":4103,"output_tokens":530,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121210':14A,17A '-2026':13A,16A '157.0.8103.38':67C 'allow':68C 'arbitrari':39B,74C 'attack':37B,71C 'browser':18B,43B 'bug':25B 'chrome':1A,19B,33B,64C 'chromium':53B,84C 'code':11A,40B,75C 'confus':4A,24B,59C 'craft':7A,50B,81C 'cve':12A,15A 'engin':30B 'execut':73C 'googl':32B,63C 'high':56B,87C 'html':51B,82C 'insid':41B,76C 'javascript':29B 'let':5A,34B 'open':48B 'page':9A,52B,83C 'prior':65C 'rate':54B 'remot':36B,70C 'run':10A,38B 'runtim':20B 'sandbox':44B,78C 'secur':85C 'sever':57B,86C 'type':3A,23B,58C 'v8':2A,21B,28B,61C 'via':79C 'victim':47B 'web':8A","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome older than 157.0.8103.38 on desktop or mobile is exposed when visiting a malicious or compromised web page. Chromium-based browsers that embed the same V8 engine may also be affected until they ship their own update. Teams can skip this for servers that do not browse the web with Chrome.","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":["browsers","chrome","high","runtime","v8"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:30+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121210","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121210","severity":null,"published_at":"2026-11-03T21:17:30+00:00","modified_at":"2026-11-03T21:17:30+00:00","first_seen_at":"2026-11-03T21:19:26+00:00","fetched_at":"2026-11-03T21:19:26+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"}