{"id":"CVE-2026-121189","kind":"vulnerability","aliases":["CVE-2026-121189"],"related":[],"title":"Chrome: use-after-free in browser lets a crafted page run code","description":"Use after free in Browser in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Low)","summary":"A use-after-free bug in the Browser component of Google Chrome before 157.0.8103.38 lets a remote attacker run arbitrary code outside the sandbox. The attack is triggered by a crafted HTML page the user opens.","severity":"low","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","endpoints","runtime"],"not_affected_if":["chrome-updated","other-browser"],"how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `chrome --version` on the machine.\n- Confirm the installed version is at least `157.0.8103.38`.","fix":"- Google Chrome: move to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:27+00:00","first_seen_at":"2026-11-03T21:19:25+00:00","triaged_at":"2026-11-03T21:23:00+00:00","updated_at":"2026-11-03T21:23:00+00:00","category":"runtime","confidence":0.8,"triage":{"at":"2026-11-03T21:23:00Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later.","reach":"internet","title":"Chrome: use-after-free in browser lets a crafted page run code","impact":"high","summary":"A use-after-free bug in the Browser component of Google Chrome before 157.0.8103.38 lets a remote attacker run arbitrary code outside the sandbox. The attack is triggered by a crafted HTML page the user opens.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browser","desktop","endpoints"],"confidence":0.8,"fix_status":"available","needs_auth":"no","worst_case":"Remote attacker runs arbitrary code outside the browser sandbox","analyst_note":"","how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `chrome --version` on the machine.\n- Confirm the installed version is at least `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":["chrome-updated","other-browser"],"who_is_affected":"Any desktop or mobile install of Google Chrome older than 157.0.8103.38 is exposed when a user visits a malicious page. Managed fleets running older Chrome builds should be inspected; users who keep Chrome auto-updated are generally covered once the update is rolled out.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"low"},"cost_usd":0.000683,"input_tokens":4101,"output_tokens":545,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121189':16A,19A '-2026':15A,18A '157.0.8103.38':39B,72C 'allow':73C 'arbitrari':45B,79C 'attack':43B,51B,76C 'browser':7A,20B,33B,66C 'bug':30B 'chrome':1A,21B,37B,69C 'chromium':89C 'code':13A,46B,80C 'compon':34B 'craft':10A,56B,86C 'cve':14A,17A 'desktop':22B 'endpoint':23B 'execut':78C 'free':5A,29B,64C 'googl':36B,68C 'html':57B,87C 'let':8A,40B 'low':92C 'open':61B 'outsid':47B,81C 'page':11A,58B,88C 'prior':70C 'remot':42B,75C 'run':12A,44B 'runtim':24B 'sandbox':49B,83C 'secur':90C 'sever':91C 'trigger':53B 'use':3A,27B,62C 'use-after-fre':2A,26B 'user':60B 'via':84C","nicknames":[],"mitigations":[],"who_affected":"Any desktop or mobile install of Google Chrome older than 157.0.8103.38 is exposed when a user visits a malicious page. Managed fleets running older Chrome builds should be inspected; users who keep Chrome auto-updated are generally covered once the update is rolled out.","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","desktop","endpoints","low","runtime"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:27+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121189","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121189","severity":null,"published_at":"2026-11-03T21:17:27+00:00","modified_at":"2026-11-03T21:17:27+00:00","first_seen_at":"2026-11-03T21:19:25+00:00","fetched_at":"2026-11-03T21:19:25+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"}