{"id":"CVE-2026-121124","kind":"vulnerability","aliases":["CVE-2026-121124"],"related":[],"title":"Google Chrome: XML coding flaw lets a crafted web page run code in sandbox","description":"Improper adherence to coding standards in XML in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)","summary":"Google Chrome versions before 157.0.8103.38 mishandle XML, so a remote attacker can craft an HTML page that may execute arbitrary code inside the browser sandbox. Chromium rates the flaw High severity.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","desktop","runtime"],"not_affected_if":["already-updated","no-chrome"],"how_to_check":"- Open Chrome, go to Settings > About Chrome and read the version number.\n- Check whether the installed version is below `157.0.8103.38`.","fix":"- Google Chrome: update to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:20+00:00","first_seen_at":"2026-11-03T21:19:19+00:00","triaged_at":"2026-11-03T21:24:56+00:00","updated_at":"2026-11-03T21:24:56+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-11-03T21:24:56Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: update to `157.0.8103.38` or later.","reach":"internet","title":"Google Chrome: XML coding flaw lets a crafted web page run code in sandbox","impact":"high","summary":"Google Chrome versions before 157.0.8103.38 mishandle XML, so a remote attacker can craft an HTML page that may execute arbitrary code inside the browser sandbox. Chromium rates the flaw High severity.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browsers","desktop"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"Attacker runs code inside the browser sandbox via a crafted page","analyst_note":"","how_to_check":"- Open Chrome, go to Settings > About Chrome and read the version number.\n- Check whether the installed version is below `157.0.8103.38`.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later: Settings > About Chrome.","needs_analyst":false,"not_affected_if":["already-updated","no-chrome"],"who_is_affected":"Anyone running Google Chrome older than 157.0.8103.38 who visits untrusted web pages is exposed. Servers and automated systems that only fetch content without a browser are not affected by this flaw.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000661,"input_tokens":4108,"output_tokens":500,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121124':17A,20A '-2026':16A,19A '157.0.8103.38':29B,68C 'adher':57C 'allow':69C 'arbitrari':44B,76C 'attack':35B,72C 'browser':21B,48B 'chrome':2A,22B,26B,65C 'chromium':50B,86C 'code':4A,12A,45B,59C,77C 'craft':8A,37B,83C 'cve':15A,18A 'desktop':23B 'execut':43B,75C 'flaw':5A,53B 'googl':1A,25B,64C 'high':54B,89C 'html':39B,84C 'improp':56C 'insid':46B,78C 'let':6A 'may':42B 'mishandl':30B 'page':10A,40B,85C 'potenti':74C 'prior':66C 'rate':51B 'remot':34B,71C 'run':11A 'runtim':24B 'sandbox':14A,49B,80C 'secur':87C 'sever':55B,88C 'standard':60C 'version':27B 'via':81C 'web':9A 'xml':3A,31B,62C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome older than 157.0.8103.38 who visits untrusted web pages is exposed. Servers and automated systems that only fetch content without a browser are not affected by this flaw.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Google Chrome to version 157.0.8103.38 or later: Settings > About Chrome.","pkeys":[],"ptokens":[],"labels":["browsers","chrome","desktop","high","runtime"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:20+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121124","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121124","severity":null,"published_at":"2026-11-03T21:17:20+00:00","modified_at":"2026-11-03T21:17:20+00:00","first_seen_at":"2026-11-03T21:19:19+00:00","fetched_at":"2026-11-03T21:19:19+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"}