{"id":"CVE-2026-118306","kind":"vulnerability","aliases":["CVE-2026-118306"],"related":[],"title":"Google Chrome: memory corruption in FileSystem lets a web page run code","description":"Memory corruption in FileSystem in Google Chrome 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: Critical)","summary":"A memory corruption flaw in the FileSystem component of Google Chrome before 156.0.8078.73 can be triggered by a crafted HTML page. An attacker who lures a user to that page could execute arbitrary code outside the browser sandbox.","severity":"critical","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","desktop","linux","macos","runtime","windows"],"not_affected_if":["patched-version"],"how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `google-chrome --version` on Linux\n- Confirm the installed version is below `156.0.8078.73`","fix":"- Update Google Chrome to `156.0.8078.73` or later\n- Relaunch the browser after the update so the fixed 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":"2026-10-27T23:32:13+00:00","updated_at":"2026-10-27T23:32:13+00:00","category":"runtime","confidence":0.8,"triage":{"at":"2026-10-27T23:32:13Z","model":"claude-haiku-5-5","output":{"fix":"- Update Google Chrome to `156.0.8078.73` or later\n- Relaunch the browser after the update so the fixed build is running","reach":"internet","title":"Google Chrome: memory corruption in FileSystem lets a web page run code","impact":"high","summary":"A memory corruption flaw in the FileSystem component of Google Chrome before 156.0.8078.73 can be triggered by a crafted HTML page. An attacker who lures a user to that page could execute arbitrary code outside the browser sandbox.","category":"runtime","nicknames":[],"who_cares":["chrome","browsers","desktop","windows","macos","linux"],"confidence":0.8,"needs_auth":"no","worst_case":"Attacker runs arbitrary code outside the browser sandbox on the user's machine","analyst_note":"Check the Chrome release notes for 156.0.8078.73 and any exploited-in-the-wild status; sources give no severity or exploit data.","how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `google-chrome --version` on Linux\n- Confirm the installed version is below `156.0.8078.73`","needs_analyst":true,"not_affected_if":["patched-version"],"who_is_affected":"Any machine running Google Chrome before 156.0.8078.73 is exposed, since the trigger is a normal web page visited in the browser. Managed fleets and developer machines that browse the web are the main concern. Systems that do not run Chrome, or run a patched build, can skip it.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"critical"},"cost_usd":0.00061,"input_tokens":3301,"output_tokens":559,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-118306':15A,18A '-2026':14A,17A '156.0.8078.73':38B,73C 'allow':74C 'arbitrari':58B,81C 'attack':48B,77C 'browser':19B,62B 'chrome':2A,20B,36B,70C 'chromium':91C 'code':12A,59B,82C 'compon':33B 'corrupt':4A,28B,65C 'could':56B 'craft':44B,88C 'critic':94C 'cve':13A,16A 'desktop':21B 'execut':57B,80C 'filesystem':6A,32B,67C 'flaw':29B 'googl':1A,35B,69C 'html':45B,89C 'let':7A 'linux':22B 'lure':50B 'maco':23B 'memori':3A,27B,64C 'outsid':60B,83C 'page':10A,46B,55B,90C 'potenti':79C 'prior':71C 'remot':76C 'run':11A 'runtim':24B 'sandbox':63B,85C 'secur':92C 'sever':93C 'trigger':41B 'user':52B 'via':86C 'web':9A 'window':25B","nicknames":[],"mitigations":[],"who_affected":"Any machine running Google Chrome before 156.0.8078.73 is exposed, since the trigger is a normal web page visited in the browser. Managed fleets and developer machines that browse the web are the main concern. Systems that do not run Chrome, or run a patched build, 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-2026-118306","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118306","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"}