{"id":"CVE-2026-121034","kind":"vulnerability","aliases":["CVE-2026-121034"],"related":[],"title":"Chrome on Windows: use-after-free lets crafted web page run code","description":"Use after free in Views in Google Chrome on on Windows prior to 157.0.8103.38 allowed a remote attacker leveraging social engineering to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)","summary":"A use-after-free bug in the Views component of Google Chrome on Windows, before version 157.0.8103.38, lets a remote attacker run arbitrary code outside the browser sandbox. The attacker must lure the user into visiting a crafted HTML page via social engineering.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","package","windows"],"not_affected_if":["chrome-updated","non-windows"],"how_to_check":"- Open Chrome and check the version under Help > About Google Chrome, or run `chrome --version` from a terminal on Windows.\n- Confirm the version is at least `157.0.8103.38`.","fix":"- Google Chrome on Windows: update to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:06+00:00","first_seen_at":"2026-11-03T21:19:09+00:00","triaged_at":"2026-11-03T21:27:33+00:00","updated_at":"2026-11-03T21:27:33+00:00","category":"package","confidence":0.8,"triage":{"at":"2026-11-03T21:27:33Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome on Windows: update to `157.0.8103.38` or later.","reach":"internet","title":"Chrome on Windows: use-after-free lets crafted web page run code","impact":"high","summary":"A use-after-free bug in the Views component of Google Chrome on Windows, before version 157.0.8103.38, lets a remote attacker run arbitrary code outside the browser sandbox. The attacker must lure the user into visiting a crafted HTML page via social engineering.","audience":"everyone","category":"package","nicknames":[],"who_cares":["chrome","windows","browser"],"confidence":0.8,"fix_status":"available","needs_auth":"no","worst_case":"Attacker runs arbitrary code outside the Chrome sandbox on the machine","analyst_note":"","how_to_check":"- Open Chrome and check the version under Help > About Google Chrome, or run `chrome --version` from a terminal on Windows.\n- Confirm the version is at least `157.0.8103.38`.","plain_action":"Update Google Chrome on your Windows computer to version 157.0.8103.38 or later.","needs_analyst":false,"not_affected_if":["chrome-updated","non-windows"],"who_is_affected":"Any Windows machine running Google Chrome older than 157.0.8103.38 is exposed when the user opens a crafted HTML page. Exploitation requires social engineering to get the user to a malicious page. Chrome installs on other platforms are not named in this entry.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000684,"input_tokens":4112,"output_tokens":546,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121034':16A,19A '-2026':15A,18A '157.0.8103.38':41B,81C 'allow':82C 'arbitrari':47B,91C 'attack':45B,54B,85C 'browser':20B,51B 'bug':29B 'chrome':1A,21B,36B,75C 'chromium':101C 'code':13A,48B,92C 'compon':33B 'craft':9A,62B,98C 'cve':14A,17A 'engin':67B,88C 'execut':90C 'free':7A,28B,70C 'googl':35B,74C 'high':104C 'html':63B,99C 'let':8A,42B 'leverag':86C 'lure':56B 'must':55B 'outsid':49B,93C 'packag':22B 'page':11A,64B,100C 'prior':79C 'remot':44B,84C 'run':12A,46B 'sandbox':52B,95C 'secur':102C 'sever':103C 'social':66B,87C 'use':5A,26B,68C 'use-after-fre':4A,25B 'user':58B 'version':40B 'via':65B,96C 'view':32B,72C 'visit':60B 'web':10A 'window':3A,23B,38B,78C","nicknames":[],"mitigations":[],"who_affected":"Any Windows machine running Google Chrome older than 157.0.8103.38 is exposed when the user opens a crafted HTML page. Exploitation requires social engineering to get the user to a malicious page. Chrome installs on other platforms are not named in this entry.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Google Chrome on your Windows computer to version 157.0.8103.38 or later.","pkeys":[],"ptokens":[],"labels":["browser","chrome","high","package","windows"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:06+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121034","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121034","severity":null,"published_at":"2026-11-03T21:17:06+00:00","modified_at":"2026-11-03T21:17:06+00:00","first_seen_at":"2026-11-03T21:19:09+00:00","fetched_at":"2026-11-03T21:19:09+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"}