{"id":"CVE-2026-113078","kind":"vulnerability","aliases":["CVE-2026-113078"],"related":[],"title":"Chrome: crafted HTML page can run code outside the sandbox","description":"Improper input validation in Compositing in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)","summary":"Google Chrome before 156.0.8078.47 has an input validation flaw in its compositing code. A remote attacker who gets a user to open a crafted HTML page could run arbitrary code outside the browser sandbox.","severity":"critical","cvss":9.6,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","desktop","runtime"],"not_affected_if":["already-updated-chrome"],"how_to_check":"Run chrome://version in Chrome and compare the version with 156.0.8078.47.","fix":"Update Google Chrome to 156.0.8078.47 or later.","status":"open","published_at":"2026-10-20T22:18:59+00:00","first_seen_at":"2026-10-23T21:57:23+00:00","triaged_at":"2026-10-23T22:37:36+00:00","updated_at":"2026-10-23T22:37:36+00:00","category":"runtime","confidence":0.8,"triage":{"at":"2026-10-23T22:37:36Z","model":"claude-haiku-5-5","output":{"fix":"Update Google Chrome to 156.0.8078.47 or later.","reach":"internet","title":"Chrome: crafted HTML page can run code outside the sandbox","impact":"high","summary":"Google Chrome before 156.0.8078.47 has an input validation flaw in its compositing code. A remote attacker who gets a user to open a crafted HTML page could run arbitrary code outside the browser sandbox.","category":"runtime","who_cares":["chrome","desktop","browsers"],"confidence":0.8,"needs_auth":"no","worst_case":"Attacker code runs outside the sandbox on the user's machine.","analyst_note":"","how_to_check":"Run chrome://version in Chrome and compare the version with 156.0.8078.47.","needs_analyst":false,"not_affected_if":["already-updated-chrome"],"user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"critical"},"cost_usd":0.000454,"input_tokens":2912,"output_tokens":326,"severity_before":"critical"},"analyst_status":null,"analyst_note":null,"search":"'-113078':13A,16A '-2026':12A,15A '156.0.8078.47':24B,65C 'allow':66C 'arbitrari':49B,73C 'attack':36B,69C 'browser':17B,53B 'chrome':1A,18B,22B,62C 'chromium':83C 'code':7A,33B,50B,74C 'composit':32B,59C 'could':47B 'craft':2A,44B,80C 'cve':11A,14A 'desktop':19B 'execut':72C 'flaw':29B 'get':38B 'googl':21B,61C 'html':3A,45B,81C 'improp':55C 'input':27B,56C 'medium':86C 'open':42B 'outsid':8A,51B,75C 'page':4A,46B,82C 'potenti':71C 'prior':63C 'remot':35B,68C 'run':6A,48B 'runtim':20B 'sandbox':10A,54B,77C 'secur':84C 'sever':85C 'user':40B 'valid':28B,57C 'via':78C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:18:59+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","cvss_by":"134c704f-9b21-4f2e-91b3-4a467353bcc0","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-113078","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113078","severity":null,"published_at":"2026-10-20T22:18:59+00:00","modified_at":"2026-10-22T23:18:25+00:00","first_seen_at":"2026-10-23T21:57:23+00:00","fetched_at":"2026-10-23T22:28:59+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"}