{"id":"CVE-2026-118332","kind":"vulnerability","aliases":["CVE-2026-118332"],"related":[],"title":"Chrome: compositing input flaw lets a crafted page escape the sandbox","description":"Improper input validation in Compositing 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: High)","summary":"Google Chrome before 156.0.8078.73 mishandles input validation in its Compositing component. A remote attacker who gets a user to open a crafted HTML page could potentially run arbitrary code outside the browser sandbox.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","desktop","endpoints","runtime"],"not_affected_if":["already-on-156.0.8078.73-or-later"],"how_to_check":"- Open Chrome, go to Settings > About Chrome, and note the version shown.\n- Run `chrome --version` on the machine (or check the installed browser version through your device management tool).","fix":"- Update Google Chrome to `156.0.8078.73` or later, then restart the browser.","status":"open","published_at":"2026-10-27T23:17:01+00:00","first_seen_at":"2026-10-27T23:29:43+00:00","triaged_at":"2026-10-27T23:31:51+00:00","updated_at":"2026-10-27T23:31:51+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-10-27T23:31:51Z","model":"claude-haiku-5-5","output":{"fix":"- Update Google Chrome to `156.0.8078.73` or later, then restart the browser.","reach":"internet","title":"Chrome: compositing input flaw lets a crafted page escape the sandbox","impact":"high","summary":"Google Chrome before 156.0.8078.73 mishandles input validation in its Compositing component. A remote attacker who gets a user to open a crafted HTML page could potentially run arbitrary code outside the browser sandbox.","category":"runtime","nicknames":[],"who_cares":["chrome","browsers","desktop","endpoints"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker code runs outside the browser sandbox on the user's machine.","analyst_note":"Check the Chrome release notes and the Chromium bug tracker entry for this CVE to confirm the fixed version and whether any in-the-wild exploitation is known.","how_to_check":"- Open Chrome, go to Settings > About Chrome, and note the version shown.\n- Run `chrome --version` on the machine (or check the installed browser version through your device management tool).","needs_analyst":true,"not_affected_if":["already-on-156.0.8078.73-or-later"],"who_is_affected":"Anyone running Google Chrome before `156.0.8078.73` on desktop or any device where users browse the web. Browser-based Chromium products that bundle the same engine may also need updating; the sources do not list them. Teams that manage browsers centrally should check their fleet versions.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000602,"input_tokens":3294,"output_tokens":546,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-118332':14A,17A '-2026':13A,16A '156.0.8078.73':26B,66C 'allow':67C 'arbitrari':50B,74C 'attack':36B,70C 'browser':18B,54B 'chrome':1A,19B,24B,63C 'chromium':84C 'code':51B,75C 'compon':33B 'composit':2A,32B,60C 'could':47B 'craft':7A,44B,81C 'cve':12A,15A 'desktop':20B 'endpoint':21B 'escap':9A 'execut':73C 'flaw':4A 'get':38B 'googl':23B,62C 'high':87C 'html':45B,82C 'improp':56C 'input':3A,28B,57C 'let':5A 'mishandl':27B 'open':42B 'outsid':52B,76C 'page':8A,46B,83C 'potenti':48B,72C 'prior':64C 'remot':35B,69C 'run':49B 'runtim':22B 'sandbox':11A,55B,78C 'secur':85C 'sever':86C 'user':40B 'valid':29B,58C 'via':79C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before `156.0.8078.73` on desktop or any device where users browse the web. Browser-based Chromium products that bundle the same engine may also need updating; the sources do not list them. Teams that manage browsers centrally should check their fleet versions.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T23:17:01+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-118332","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118332","severity":null,"published_at":"2026-10-27T23:17:01+00:00","modified_at":"2026-10-27T23:17:01+00:00","first_seen_at":"2026-10-27T23:29:43+00:00","fetched_at":"2026-10-27T23:29:43+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"}