{"id":"CVE-2026-118309","kind":"vulnerability","aliases":["CVE-2026-118309"],"related":[],"title":"Chrome on Android: input validation flaw lets crafted page escape sandbox","description":"Improper input validation in UI in Google Chrome on on Android 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":"Google Chrome on Android before 156.0.8078.73 mishandles input validation in its UI. A remote attacker can serve a crafted HTML page to potentially run arbitrary code outside the browser sandbox.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["android","browser","chrome","mobile","runtime"],"not_affected_if":["chrome-updated","no-android-chrome"],"how_to_check":"- Open Chrome on the Android device, go to Settings > About Chrome, and read the version\n- Check the installed version with `chrome://version` in the browser address bar","fix":"- Update Google Chrome on Android to `156.0.8078.73` or later through the Play Store","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 Android to `156.0.8078.73` or later through the Play Store","reach":"internet","title":"Chrome on Android: input validation flaw lets crafted page escape sandbox","impact":"high","summary":"Google Chrome on Android before 156.0.8078.73 mishandles input validation in its UI. A remote attacker can serve a crafted HTML page to potentially run arbitrary code outside the browser sandbox.","category":"runtime","nicknames":[],"who_cares":["android","chrome","mobile","browser"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker may run arbitrary code outside the browser sandbox","analyst_note":"Check the Chrome release notes for 156.0.8078.73 and the NVD entry to confirm the fixed version and whether the flaw is exploited.","how_to_check":"- Open Chrome on the Android device, go to Settings > About Chrome, and read the version\n- Check the installed version with `chrome://version` in the browser address bar","needs_analyst":true,"not_affected_if":["chrome-updated","no-android-chrome"],"who_is_affected":"Any Android device running Google Chrome older than 156.0.8078.73 that browses untrusted web content is exposed, since the attack needs only a crafted HTML page. Devices on managed Chrome builds should confirm their vendor has shipped the fix. Teams that only ship Chrome-independent apps with no browser component can skip it.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000601,"input_tokens":3298,"output_tokens":543,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-118309':14A,17A '-2026':13A,16A '156.0.8078.73':28B,66C 'allow':67C 'android':3A,18B,26B,63C 'arbitrari':47B,74C 'attack':37B,70C 'browser':19B,51B 'chrome':1A,20B,24B,60C 'chromium':84C 'code':48B,75C 'craft':8A,41B,81C 'cve':12A,15A 'escap':10A 'execut':73C 'flaw':6A 'googl':23B,59C 'high':87C 'html':42B,82C 'improp':53C 'input':4A,30B,54C 'let':7A 'mishandl':29B 'mobil':21B 'outsid':49B,76C 'page':9A,43B,83C 'potenti':45B,72C 'prior':64C 'remot':36B,69C 'run':46B 'runtim':22B 'sandbox':11A,52B,78C 'secur':85C 'serv':39B 'sever':86C 'ui':34B,57C 'valid':5A,31B,55C 'via':79C","nicknames":[],"mitigations":[],"who_affected":"Any Android device running Google Chrome older than 156.0.8078.73 that browses untrusted web content is exposed, since the attack needs only a crafted HTML page. Devices on managed Chrome builds should confirm their vendor has shipped the fix. Teams that only ship Chrome-independent apps with no browser component can skip it.","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-2026-118309","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118309","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"}