{"id":"CVE-2026-121048","kind":"vulnerability","aliases":["CVE-2026-121048"],"related":[],"title":"Chrome: V8 race condition lets a crafted web page run code","description":"Race condition 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: Medium)","summary":"A race condition in the V8 JavaScript engine in Google Chrome versions before 157.0.8103.38 can be triggered by a crafted HTML page. A remote attacker can execute arbitrary code inside the browser sandbox.","severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","linux","macos","runtime","windows"],"not_affected_if":["up-to-date-chrome"],"how_to_check":"- Check the Chrome version under Chrome menu > Help > About Google Chrome, or `chrome://version`, and compare it with `157.0.8103.38`.","fix":"- Google Chrome: move to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:09+00:00","first_seen_at":"2026-11-03T21:19:10+00:00","triaged_at":"2026-11-03T21:27:19+00:00","updated_at":"2026-11-03T21:27:19+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-11-03T21:27:19Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later.","reach":"internet","title":"Chrome: V8 race condition lets a crafted web page run code","impact":"medium","summary":"A race condition in the V8 JavaScript engine in Google Chrome versions before 157.0.8103.38 can be triggered by a crafted HTML page. A remote attacker can execute arbitrary code inside the browser sandbox.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browser","windows","macos","linux"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"Attacker runs code inside the browser sandbox via a crafted page","analyst_note":"","how_to_check":"- Check the Chrome version under Chrome menu > Help > About Google Chrome, or `chrome://version`, and compare it with `157.0.8103.38`.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later: Chrome menu > Help > About Google Chrome.","needs_analyst":false,"not_affected_if":["up-to-date-chrome"],"who_is_affected":"Anyone running Google Chrome before 157.0.8103.38 who visits a malicious or compromised web page. The flaw is in the browser's JavaScript engine, so the exposure is the browser itself, not a server-side setting. Users on up-to-date Chrome are not affected.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000678,"input_tokens":4103,"output_tokens":535,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121048':14A,17A '-2026':13A,16A '157.0.8103.38':37B,66C 'allow':67C 'arbitrari':51B,73C 'attack':48B,70C 'browser':18B,55B 'chrome':1A,19B,34B,63C 'chromium':83C 'code':11A,52B,74C 'condit':4A,26B,58C 'craft':7A,43B,80C 'cve':12A,15A 'engin':31B 'execut':50B,72C 'googl':33B,62C 'html':44B,81C 'insid':53B,75C 'javascript':30B 'let':5A 'linux':20B 'maco':21B 'medium':86C 'page':9A,45B,82C 'prior':64C 'race':3A,25B,57C 'remot':47B,69C 'run':10A 'runtim':22B 'sandbox':56B,77C 'secur':84C 'sever':85C 'trigger':40B 'v8':2A,29B,60C 'version':35B 'via':78C 'web':8A 'window':23B","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before 157.0.8103.38 who visits a malicious or compromised web page. The flaw is in the browser's JavaScript engine, so the exposure is the browser itself, not a server-side setting. Users on up-to-date Chrome are not affected.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Google Chrome to version 157.0.8103.38 or later: Chrome menu > Help > About Google Chrome.","pkeys":[],"ptokens":[],"labels":["browser","chrome","linux","macos","medium","runtime","windows"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:09+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121048","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121048","severity":null,"published_at":"2026-11-03T21:17:09+00:00","modified_at":"2026-11-03T21:17:09+00:00","first_seen_at":"2026-11-03T21:19:10+00:00","fetched_at":"2026-11-03T21:19:10+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"}