{"id":"CVE-2026-121065","kind":"vulnerability","aliases":["CVE-2026-121065"],"related":[],"title":"Chrome: DevTools authorization flaw lets crafted pages bypass origin policy","description":"Incorrect 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 HTML page. (Chromium security severity: Medium)","summary":"Google Chrome's DevTools had an incorrect authorization check that let a remote attacker bypass web origin policy using a crafted HTML page. Exploitation relies on social engineering, such as tricking a user into visiting the page.","severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","package"],"not_affected_if":["chrome-updated"],"how_to_check":"- Check the installed Chrome version (Chrome menu > Help > About Google Chrome) and compare it with `157.0.8103.38`.","fix":"- Google Chrome: move to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:11+00:00","first_seen_at":"2026-11-03T21:19:11+00:00","triaged_at":"2026-11-03T21:27:04+00:00","updated_at":"2026-11-03T21:27:04+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-11-03T21:27:04Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later.","reach":"internet","title":"Chrome: DevTools authorization flaw lets crafted pages bypass origin policy","impact":"medium","summary":"Google Chrome's DevTools had an incorrect authorization check that let a remote attacker bypass web origin policy using a crafted HTML page. Exploitation relies on social engineering, such as tricking a user into visiting the page.","audience":"everyone","category":"package","nicknames":[],"who_cares":["chrome","browser","desktop"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"attacker bypasses web origin policy from a crafted page","analyst_note":"","how_to_check":"- Check the installed Chrome version (Chrome menu > Help > About Google Chrome) and compare it with `157.0.8103.38`.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later, then restart the browser.","needs_analyst":false,"not_affected_if":["chrome-updated"],"who_is_affected":"Any desktop installation of Google Chrome before 157.0.8103.38 is affected. Exposure depends on a user opening an attacker-crafted page, so managed fleets should prioritize browsers that browse untrusted sites.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000657,"input_tokens":4109,"output_tokens":492,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121065':13A,16A '-2026':12A,15A '157.0.8103.38':67C 'allow':68C 'attack':34B,71C 'author':3A,28B,59C 'browser':17B 'bypass':8A,35B,76C 'check':29B 'chrome':1A,18B,22B,64C 'chromium':85C 'craft':6A,41B,82C 'cve':11A,14A 'desktop':19B 'devtool':2A,24B,61C 'engin':48B,74C 'exploit':44B 'flaw':4A 'googl':21B,63C 'html':42B,83C 'incorrect':27B,58C 'let':5A,31B 'leverag':72C 'medium':88C 'origin':9A,37B,78C 'packag':20B 'page':7A,43B,57B,84C 'polici':10A,38B,79C 'prior':65C 'reli':45B 'remot':33B,70C 'secur':86C 'sever':87C 'social':47B,73C 'trick':51B 'use':39B 'user':53B 'via':80C 'visit':55B 'web':36B,77C","nicknames":[],"mitigations":[],"who_affected":"Any desktop installation of Google Chrome before 157.0.8103.38 is affected. Exposure depends on a user opening an attacker-crafted page, so managed fleets should prioritize browsers that browse untrusted sites.","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, then restart the browser.","pkeys":[],"ptokens":[],"labels":["browser","chrome","desktop","medium","package"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:11+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121065","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121065","severity":null,"published_at":"2026-11-03T21:17:11+00:00","modified_at":"2026-11-03T21:17:11+00:00","first_seen_at":"2026-11-03T21:19:11+00:00","fetched_at":"2026-11-03T21:19:11+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"}