{"id":"CVE-2026-121101","kind":"vulnerability","aliases":["CVE-2026-121101"],"related":[],"title":"Chrome: DevTools flaw lets a crafted extension reach privileged pages","description":"Missing authorization in DevTools in Google Chrome prior to 157.0.8103.38 allowed a remote attacker leveraging social engineering to bypass system access restrictions into a privileged page via a crafted Chrome extension. (Chromium security severity: Low)","summary":"Google Chrome before 157.0.8103.38 has a missing authorization check in DevTools. A remote attacker who tricks a user into installing a crafted Chrome extension can bypass access restrictions and reach a privileged page.","severity":"low","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser-extensions","chrome","desktop","package"],"not_affected_if":["chrome-157.0.8103.38-or-later"],"how_to_check":"- Check the Chrome version in the browser's About page or with `chrome://version`\n- Compare the installed version against `157.0.8103.38`","fix":"- Google Chrome: `157.0.8103.38`","status":"open","published_at":"2026-11-03T21:17:16+00:00","first_seen_at":"2026-11-03T21:19:13+00:00","triaged_at":"2026-11-03T21:25:17+00:00","updated_at":"2026-11-03T21:25:17+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-11-03T21:25:17Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: `157.0.8103.38`","reach":"internet","title":"Chrome: DevTools flaw lets a crafted extension reach privileged pages","impact":"medium","summary":"Google Chrome before 157.0.8103.38 has a missing authorization check in DevTools. A remote attacker who tricks a user into installing a crafted Chrome extension can bypass access restrictions and reach a privileged page.","audience":"everyone","category":"package","nicknames":[],"who_cares":["chrome","browser-extensions","desktop"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"Attacker reaches privileged browser page after user installs extension","analyst_note":"","how_to_check":"- Check the Chrome version in the browser's About page or with `chrome://version`\n- Compare the installed version against `157.0.8103.38`","plain_action":"Update Google Chrome to version 157.0.8103.38 or later, and only install extensions you trust.","needs_analyst":false,"not_affected_if":["chrome-157.0.8103.38-or-later"],"who_is_affected":"Anyone running Google Chrome older than 157.0.8103.38 is exposed. The attack needs a user to install a crafted extension, so people who install only trusted extensions face less risk. Chromium's own rating for this issue is Low.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"low"},"cost_usd":0.000663,"input_tokens":4113,"output_tokens":504,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121101':13A,16A '-2026':12A,15A '157.0.8103.38':26B,65C 'access':49B,76C 'allow':66C 'attack':36B,69C 'author':30B,57C 'browser':18B 'browser-extens':17B 'bypass':48B,74C 'check':31B 'chrome':1A,20B,24B,45B,62C,85C 'chromium':87C 'craft':6A,44B,84C 'cve':11A,14A 'desktop':21B 'devtool':2A,33B,59C 'engin':72C 'extens':7A,19B,46B,86C 'flaw':3A 'googl':23B,61C 'instal':42B 'let':4A 'leverag':70C 'low':90C 'miss':29B,56C 'packag':22B 'page':10A,55B,81C 'prior':63C 'privileg':9A,54B,80C 'reach':8A,52B 'remot':35B,68C 'restrict':50B,77C 'secur':88C 'sever':89C 'social':71C 'system':75C 'trick':38B 'user':40B 'via':82C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome older than 157.0.8103.38 is exposed. The attack needs a user to install a crafted extension, so people who install only trusted extensions face less risk. Chromium's own rating for this issue is Low.","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 only install extensions you trust.","pkeys":[],"ptokens":[],"labels":["browserextensions","chrome","desktop","low","package"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:16+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121101","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121101","severity":null,"published_at":"2026-11-03T21:17:16+00:00","modified_at":"2026-11-03T21:17:16+00:00","first_seen_at":"2026-11-03T21:19:13+00:00","fetched_at":"2026-11-03T21:19:13+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"}