{"id":"CVE-2026-121169","kind":"vulnerability","aliases":["CVE-2026-121169"],"related":[],"title":"Chrome: DevTools flaw lets a crafted extension bypass web origin policy","description":"Missing authorization in DevTools in Google Chrome prior to 157.0.8103.38 allowed a remote attacker leveraging social engineering to bypass web origin policy via a crafted Chrome extension. (Chromium security severity: Low)","summary":"A missing authorization check in the DevTools component of Google Chrome lets a remote attacker, using social engineering and a crafted Chrome extension, bypass web origin policy. The Chromium security severity is rated Low.","severity":"low","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","runtime"],"not_affected_if":["chrome-updated","extensions-restricted"],"how_to_check":"- Check the installed Chrome version at chrome://settings/help and compare it with `157.0.8103.38`.\n- Review installed extensions at chrome://extensions for ones you do not recognise.","fix":"- Chrome: move to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:25+00:00","first_seen_at":"2026-11-03T21:19:23+00:00","triaged_at":"2026-11-03T21:23:19+00:00","updated_at":"2026-11-03T21:23:19+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-11-03T21:23:19Z","model":"claude-haiku-5-5","output":{"fix":"- Chrome: move to `157.0.8103.38` or later.","reach":"internet","title":"Chrome: DevTools flaw lets a crafted extension bypass web origin policy","impact":"medium","summary":"A missing authorization check in the DevTools component of Google Chrome lets a remote attacker, using social engineering and a crafted Chrome extension, bypass web origin policy. The Chromium security severity is rated Low.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browser","desktop"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"Attacker bypasses web origin policy through a malicious extension","analyst_note":"","how_to_check":"- Check the installed Chrome version at chrome://settings/help and compare it with `157.0.8103.38`.\n- Review installed extensions at chrome://extensions for ones you do not recognise.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later: Chrome menu > Help > About Google Chrome.","needs_analyst":false,"not_affected_if":["chrome-updated","extensions-restricted"],"who_is_affected":"Anyone running Google Chrome older than 157.0.8103.38 is exposed, and the attack needs a user to install a malicious extension. Managed fleets with extension allow-lists are less exposed. unknown for any further detail the sources do not give.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"low"},"cost_usd":0.000676,"input_tokens":4106,"output_tokens":531,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121169':14A,17A '-2026':13A,16A '157.0.8103.38':65C 'allow':66C 'attack':36B,69C 'author':24B,57C 'browser':18B 'bypass':8A,45B,74C 'check':25B 'chrome':1A,19B,32B,43B,62C,81C 'chromium':50B,83C 'compon':29B 'craft':6A,42B,80C 'cve':12A,15A 'desktop':20B 'devtool':2A,28B,59C 'engin':39B,72C 'extens':7A,44B,82C 'flaw':3A 'googl':31B,61C 'let':4A,33B 'leverag':70C 'low':55B,86C 'miss':23B,56C 'origin':10A,47B,76C 'polici':11A,48B,77C 'prior':63C 'rate':54B 'remot':35B,68C 'runtim':21B 'secur':51B,84C 'sever':52B,85C 'social':38B,71C 'use':37B 'via':78C 'web':9A,46B,75C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome older than 157.0.8103.38 is exposed, and the attack needs a user to install a malicious extension. Managed fleets with extension allow-lists are less exposed. unknown for any further detail the sources do not give.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Google Chrome to version 157.0.8103.38 or later: Chrome menu > Help > About Google Chrome.","pkeys":[],"ptokens":[],"labels":["browser","chrome","desktop","low","runtime"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:25+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121169","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121169","severity":null,"published_at":"2026-11-03T21:17:25+00:00","modified_at":"2026-11-03T21:17:25+00:00","first_seen_at":"2026-11-03T21:19:23+00:00","fetched_at":"2026-11-03T21:19:23+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"}