{"id":"CVE-2026-121029","kind":"vulnerability","aliases":["CVE-2026-121029"],"related":[],"title":"Chrome: crafted web page can bypass site isolation protections","description":"Incorrect authorization in ORB in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to bypass site isolation via a crafted HTML page. (Chromium security severity: Low)","summary":"Google Chrome's ORB (Opaque Response Blocking) component has an incorrect authorization check that lets a crafted HTML page bypass site isolation. An attacker who gets a victim to visit that page could read data from other sites the victim is logged into.","severity":"low","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","linux","macos","runtime","windows"],"not_affected_if":["chrome-updated"],"how_to_check":"- Check the installed Chrome version in Chrome's About page (chrome://settings/help) or with `google-chrome --version` on Linux.\n- Flag any installation below `157.0.8103.38` as affected.","fix":"- Google Chrome: move to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:05+00:00","first_seen_at":"2026-11-03T21:19:08+00:00","triaged_at":"2026-11-03T21:27:37+00:00","updated_at":"2026-11-03T21:27:37+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-11-03T21:27:37Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later.","reach":"internet","title":"Chrome: crafted web page can bypass site isolation protections","impact":"medium","summary":"Google Chrome's ORB (Opaque Response Blocking) component has an incorrect authorization check that lets a crafted HTML page bypass site isolation. An attacker who gets a victim to visit that page could read data from other sites the victim is logged into.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browsers","windows","macos","linux"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"Attacker reads cross-site data from a victim's browser session","analyst_note":"","how_to_check":"- Check the installed Chrome version in Chrome's About page (chrome://settings/help) or with `google-chrome --version` on Linux.\n- Flag any installation below `157.0.8103.38` as affected.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later through its built-in update check.","needs_analyst":false,"not_affected_if":["chrome-updated"],"who_is_affected":"Anyone running Google Chrome before 157.0.8103.38 is exposed, since the flaw is in the browser itself and is triggered by visiting a malicious page. Teams can skip this for systems that do not run Chrome, though other Chromium-based browsers may carry the same flaw depending on their update schedule, which the sources do not say.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"low"},"cost_usd":0.000688,"input_tokens":4098,"output_tokens":557,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121029':12A,15A '-2026':11A,14A '157.0.8103.38':73C 'allow':74C 'attack':45B,77C 'author':33B,65C 'block':28B 'browser':16B 'bypass':6A,41B,79C 'check':34B 'chrome':1A,17B,23B,70C 'chromium':87C 'compon':29B 'could':54B 'craft':2A,38B,84C 'cve':10A,13A 'data':56B 'get':47B 'googl':22B,69C 'html':39B,85C 'incorrect':32B,64C 'isol':8A,43B,81C 'let':36B 'linux':18B 'log':63B 'low':90C 'maco':19B 'opaqu':26B 'orb':25B,67C 'page':4A,40B,53B,86C 'prior':71C 'protect':9A 'read':55B 'remot':76C 'respons':27B 'runtim':20B 'secur':88C 'sever':89C 'site':7A,42B,59B,80C 'via':82C 'victim':49B,61B 'visit':51B 'web':3A 'window':21B","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before 157.0.8103.38 is exposed, since the flaw is in the browser itself and is triggered by visiting a malicious page. Teams can skip this for systems that do not run Chrome, though other Chromium-based browsers may carry the same flaw depending on their update schedule, which the sources do not say.","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 through its built-in update check.","pkeys":[],"ptokens":[],"labels":["browsers","chrome","linux","low","macos","runtime","windows"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:05+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121029","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121029","severity":null,"published_at":"2026-11-03T21:17:05+00:00","modified_at":"2026-11-03T21:17:05+00:00","first_seen_at":"2026-11-03T21:19:08+00:00","fetched_at":"2026-11-03T21:19:08+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"}