{"id":"CVE-2026-118310","kind":"vulnerability","aliases":["CVE-2026-118310"],"related":[],"title":"Chrome on Windows: input validation flaw lets crafted page escape sandbox","description":"Improper input validation in Views in Google Chrome on on Windows prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)","summary":"Improper input validation in the Views component of Google Chrome on Windows lets a remote attacker run arbitrary code outside the browser sandbox via a crafted HTML page. Chromium rates the flaw High severity.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","runtime","windows"],"not_affected_if":["already-on-156.0.8078.73-or-later"],"how_to_check":"- Check the installed Chrome version at chrome://settings/help or with `chrome --version`\n- Confirm the machine runs Windows, since the flaw is listed for Windows builds","fix":"- Update Google Chrome on Windows to `156.0.8078.73` or later\n- Restart the browser after the update so the new build is running","status":"open","published_at":"2026-10-27T23:16:59+00:00","first_seen_at":"2026-10-27T23:29:42+00:00","triaged_at":"2026-10-27T23:32:10+00:00","updated_at":"2026-10-27T23:32:10+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-10-27T23:32:10Z","model":"claude-haiku-5-5","output":{"fix":"- Update Google Chrome on Windows to `156.0.8078.73` or later\n- Restart the browser after the update so the new build is running","reach":"internet","title":"Chrome on Windows: input validation flaw lets crafted page escape sandbox","impact":"high","summary":"Improper input validation in the Views component of Google Chrome on Windows lets a remote attacker run arbitrary code outside the browser sandbox via a crafted HTML page. Chromium rates the flaw High severity.","category":"runtime","nicknames":[],"who_cares":["chrome","windows","browsers"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker runs code outside the browser sandbox on the victim's Windows machine","analyst_note":"Check the Chrome release notes and Chromium security advisory for CVE-2026-118310 to confirm exploitation status and any CVSS score.","how_to_check":"- Check the installed Chrome version at chrome://settings/help or with `chrome --version`\n- Confirm the machine runs Windows, since the flaw is listed for Windows builds","needs_analyst":true,"not_affected_if":["already-on-156.0.8078.73-or-later"],"who_is_affected":"Any Windows machine running Google Chrome older than 156.0.8078.73 is exposed, since a victim only needs to load a crafted HTML page. Organisations that manage browsers centrally should check the fleet version. Machines on other operating systems are not listed as affected.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000602,"input_tokens":3299,"output_tokens":545,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-118310':14A,17A '-2026':13A,16A '156.0.8078.73':69C 'allow':70C 'arbitrari':39B,77C 'attack':37B,73C 'browser':18B,43B 'chrome':1A,19B,31B,63C 'chromium':50B,87C 'code':40B,78C 'compon':28B 'craft':8A,47B,84C 'cve':12A,15A 'escap':10A 'execut':76C 'flaw':6A,53B 'googl':30B,62C 'high':54B,90C 'html':48B,85C 'improp':22B,56C 'input':4A,23B,57C 'let':7A,34B 'outsid':41B,79C 'page':9A,49B,86C 'potenti':75C 'prior':67C 'rate':51B 'remot':36B,72C 'run':38B 'runtim':20B 'sandbox':11A,44B,81C 'secur':88C 'sever':55B,89C 'valid':5A,24B,58C 'via':45B,82C 'view':27B,60C 'window':3A,21B,33B,66C","nicknames":[],"mitigations":[],"who_affected":"Any Windows machine running Google Chrome older than 156.0.8078.73 is exposed, since a victim only needs to load a crafted HTML page. Organisations that manage browsers centrally should check the fleet version. Machines on other operating systems are not listed as affected.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T23:16:59+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-118310","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118310","severity":null,"published_at":"2026-10-27T23:16:59+00:00","modified_at":"2026-10-27T23:16:59+00:00","first_seen_at":"2026-10-27T23:29:42+00:00","fetched_at":"2026-10-27T23:29:42+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"}