{"id":"CVE-2026-121132","kind":"vulnerability","aliases":["CVE-2026-121132"],"related":[],"title":"Chrome: V8 flaw lets a crafted web page read cross-origin data","description":"Information leak in V8 in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to obtain cross-origin data via a crafted HTML page. (Chromium security severity: Medium)","summary":"A flaw in V8, the JavaScript engine inside Google Chrome, lets a remote attacker obtain data from other websites through a crafted HTML page. Chromium rates it Medium severity.","severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","endpoints","runtime"],"not_affected_if":["chrome-updated"],"how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `google-chrome --version` on Linux\n- Compare the installed version with the fixed release, `157.0.8103.38`\n- Check the Chrome versions managed on fleet machines with your device management tool","fix":"- Google Chrome: move to `157.0.8103.38` or later","status":"open","published_at":"2026-11-03T21:17:21+00:00","first_seen_at":"2026-11-03T21:19:21+00:00","triaged_at":"2026-11-03T21:24:48+00:00","updated_at":"2026-11-03T21:24:48+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-11-03T21:24:48Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later","reach":"internet","title":"Chrome: V8 flaw lets a crafted web page read cross-origin data","impact":"medium","summary":"A flaw in V8, the JavaScript engine inside Google Chrome, lets a remote attacker obtain data from other websites through a crafted HTML page. Chromium rates it Medium severity.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browsers","endpoints"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"A crafted web page reads data from other sites the user has open.","analyst_note":"","how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `google-chrome --version` on Linux\n- Compare the installed version with the fixed release, `157.0.8103.38`\n- Check the Chrome versions managed on fleet machines with your device management tool","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":["chrome-updated"],"who_is_affected":"Anyone running Google Chrome before 157.0.8103.38 is exposed when they visit a malicious or compromised web page. Systems that only run a pinned, separately maintained Chromium build need to check that build's own update status. Browsing data from other sites is the concern, so people who never open untrusted pages carry less risk.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000693,"input_tokens":4098,"output_tokens":566,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121132':16A,19A '-2026':15A,18A '157.0.8103.38':62C 'allow':63C 'attack':37B,66C 'browser':20B 'chrome':1A,21B,33B,59C 'chromium':48B,78C 'craft':6A,45B,75C 'cross':11A,70C 'cross-origin':10A,69C 'cve':14A,17A 'data':13A,39B,72C 'endpoint':22B 'engin':30B 'flaw':3A,25B 'googl':32B,58C 'html':46B,76C 'inform':53C 'insid':31B 'javascript':29B 'leak':54C 'let':4A,34B 'medium':51B,81C 'obtain':38B,68C 'origin':12A,71C 'page':8A,47B,77C 'prior':60C 'rate':49B 'read':9A 'remot':36B,65C 'runtim':23B 'secur':79C 'sever':52B,80C 'v8':2A,27B,56C 'via':73C 'web':7A 'websit':42B","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before 157.0.8103.38 is exposed when they visit a malicious or compromised web page. Systems that only run a pinned, separately maintained Chromium build need to check that build's own update status. Browsing data from other sites is the concern, so people who never open untrusted pages carry less risk.","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":["browsers","chrome","endpoints","medium","runtime"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:21+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121132","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121132","severity":null,"published_at":"2026-11-03T21:17:21+00:00","modified_at":"2026-11-03T21:17:21+00:00","first_seen_at":"2026-11-03T21:19:21+00:00","fetched_at":"2026-11-03T21:19:21+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"}