{"id":"CVE-2026-118355","kind":"vulnerability","aliases":["CVE-2026-118355"],"related":[],"title":"Google Chrome: crafted HTML page can escape the sandbox and run code","description":"Improper input validation in Command 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":"Chrome prior to 156.0.8078.73 mishandles input in a Command component, so a crafted HTML page may run arbitrary code outside the browser sandbox. Chromium rates it High severity.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","desktop","managed-fleets","other"],"not_affected_if":["already-updated"],"how_to_check":"- Check the installed Chrome version in the browser's About page or with `google-chrome --version`\n- Compare it against the fixed version `156.0.8078.73`","fix":"- Update Google Chrome to `156.0.8078.73` or later","status":"open","published_at":"2026-10-27T23:17:04+00:00","first_seen_at":"2026-10-27T23:29:44+00:00","triaged_at":"2026-10-27T23:31:27+00:00","updated_at":"2026-10-27T23:31:27+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-10-27T23:31:27Z","model":"claude-haiku-5-5","output":{"fix":"- Update Google Chrome to `156.0.8078.73` or later","reach":"internet","title":"Google Chrome: crafted HTML page can escape the sandbox and run code","impact":"high","summary":"Chrome prior to 156.0.8078.73 mishandles input in a Command component, so a crafted HTML page may run arbitrary code outside the browser sandbox. Chromium rates it High severity.","category":"other","nicknames":[],"who_cares":["chrome","browsers","desktop","managed-fleets"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker runs arbitrary code outside the browser sandbox via a web page","analyst_note":"Sources give no exploitation status or detail on the Command component; check the Chrome release notes for the 156.0.8078.73 entry at https://nvd.nist.gov/vuln/detail/CVE-2026-118355.","how_to_check":"- Check the installed Chrome version in the browser's About page or with `google-chrome --version`\n- Compare it against the fixed version `156.0.8078.73`","needs_analyst":true,"not_affected_if":["already-updated"],"who_is_affected":"Anyone running Google Chrome older than `156.0.8078.73` on desktop or managed fleets; the exposure comes from visiting a page the attacker controls. The sources do not say which platforms or channels are affected beyond that.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000588,"input_tokens":3290,"output_tokens":517,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-118355':15A,18A '-2026':14A,17A '156.0.8078.73':28B,63C 'allow':64C 'arbitrari':42B,71C 'attack':67C 'browser':19B,46B 'chrome':2A,20B,25B,60C 'chromium':48B,81C 'code':12A,43B,72C 'command':33B,57C 'compon':34B 'craft':3A,37B,78C 'cve':13A,16A 'desktop':21B 'escap':7A 'execut':70C 'fleet':24B 'googl':1A,59C 'high':51B,84C 'html':4A,38B,79C 'improp':53C 'input':30B,54C 'manag':23B 'managed-fleet':22B 'may':40B 'mishandl':29B 'outsid':44B,73C 'page':5A,39B,80C 'potenti':69C 'prior':26B,61C 'rate':49B 'remot':66C 'run':11A,41B 'sandbox':9A,47B,75C 'secur':82C 'sever':52B,83C 'valid':55C 'via':76C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome older than `156.0.8078.73` on desktop or managed fleets; the exposure comes from visiting a page the attacker controls. The sources do not say which platforms or channels are affected beyond that.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T23:17:04+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-118355","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118355","severity":null,"published_at":"2026-10-27T23:17:04+00:00","modified_at":"2026-10-27T23:17:04+00:00","first_seen_at":"2026-10-27T23:29:44+00:00","fetched_at":"2026-10-27T23:29:44+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"}