{"id":"CVE-2026-121193","kind":"vulnerability","aliases":["CVE-2026-121193"],"related":[],"title":"Chrome: extension authorization flaw lets a crafted extension bypass system access restrictions","description":"Incorrect authorization in Extensions in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to bypass system access restrictions via a crafted Chrome extension. (Chromium security severity: Medium)","summary":"Google Chrome versions before 157.0.8103.38 have an incorrect authorization check in extensions. A remote attacker who supplies a crafted Chrome extension can bypass system access restrictions.","severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","endpoints","runtime"],"not_affected_if":["chrome-updated"],"how_to_check":"- Check the installed Chrome version in Chrome's About page or with the browser's version output; compare it against `157.0.8103.38`.","fix":"- Google Chrome: move to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:27+00:00","first_seen_at":"2026-11-03T21:19:25+00:00","triaged_at":"2026-11-03T21:22:57+00:00","updated_at":"2026-11-03T21:22:57+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-11-03T21:22:57Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later.","reach":"internet","title":"Chrome: extension authorization flaw lets a crafted extension bypass system access restrictions","impact":"medium","summary":"Google Chrome versions before 157.0.8103.38 have an incorrect authorization check in extensions. A remote attacker who supplies a crafted Chrome extension can bypass system access restrictions.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browser","endpoints"],"confidence":0.6,"fix_status":"available","needs_auth":"unknown","worst_case":"crafted extension bypasses browser system access restrictions","analyst_note":"","how_to_check":"- Check the installed Chrome version in Chrome's About page or with the browser's version output; compare it against `157.0.8103.38`.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later, and check that Chrome is set to update automatically.","needs_analyst":false,"not_affected_if":["chrome-updated"],"who_is_affected":"Anyone running Google Chrome before 157.0.8103.38 is exposed, most likely when a crafted extension is installed or delivered to the browser. Managed fleets should confirm the version across endpoints. Browsers already on 157.0.8103.38 or later are not affected.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000666,"input_tokens":4104,"output_tokens":511,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121193':15A,18A '-2026':14A,17A '157.0.8103.38':27B,58C 'access':11A,47B,66C 'allow':59C 'attack':37B,62C 'author':3A,31B,50C 'browser':19B 'bypass':9A,45B,64C 'check':32B 'chrome':1A,20B,24B,42B,55C,71C 'chromium':73C 'craft':7A,41B,70C 'cve':13A,16A 'endpoint':21B 'extens':2A,8A,34B,43B,52C,72C 'flaw':4A 'googl':23B,54C 'incorrect':30B,49C 'let':5A 'medium':76C 'prior':56C 'remot':36B,61C 'restrict':12A,48B,67C 'runtim':22B 'secur':74C 'sever':75C 'suppli':39B 'system':10A,46B,65C 'version':25B 'via':68C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before 157.0.8103.38 is exposed, most likely when a crafted extension is installed or delivered to the browser. Managed fleets should confirm the version across endpoints. Browsers already on 157.0.8103.38 or later are not affected.","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, and check that Chrome is set to update automatically.","pkeys":[],"ptokens":[],"labels":["browser","chrome","endpoints","medium","runtime"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:27+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121193","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121193","severity":null,"published_at":"2026-11-03T21:17:27+00:00","modified_at":"2026-11-03T21:17:28+00:00","first_seen_at":"2026-11-03T21:19:25+00:00","fetched_at":"2026-11-03T21:19:25+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"}