{"id":"CVE-2026-126878","kind":"vulnerability","aliases":["CVE-2026-126878"],"related":[],"title":"Chrome: crafted HTML page leaks cross-origin data from the browser core","description":"Information leak in Core in Google Chrome prior to 157.0.8103.78 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)","summary":"Google Chrome before 157.0.8103.78 has an information leak in its core engine. A remote attacker can use a crafted HTML page to read data from other websites.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","mobile","runtime"],"not_affected_if":["up-to-date-chrome"],"how_to_check":"- Check the installed Chrome version in the browser's About page or with `chrome://version`\n- Look for managed Chrome installs on managed devices and confirm their version is at least `157.0.8103.78`","fix":"- Google Chrome: `157.0.8103.78`","status":"open","published_at":"2026-11-11T23:17:16+00:00","first_seen_at":"2026-11-11T23:29:38+00:00","triaged_at":"2026-11-11T23:32:12+00:00","updated_at":"2026-11-11T23:32:12+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-11-11T23:32:12Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: `157.0.8103.78`","reach":"internet","title":"Chrome: crafted HTML page leaks cross-origin data from the browser core","impact":"medium","summary":"Google Chrome before 157.0.8103.78 has an information leak in its core engine. A remote attacker can use a crafted HTML page to read data from other websites.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browser","desktop","mobile"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"Attacker reads cross-origin data from sites the victim visits.","analyst_note":"","how_to_check":"- Check the installed Chrome version in the browser's About page or with `chrome://version`\n- Look for managed Chrome installs on managed devices and confirm their version is at least `157.0.8103.78`","plain_action":"Update Google Chrome to version 157.0.8103.78 or later through its built-in update check.","product_name":"","needs_analyst":false,"not_affected_if":["up-to-date-chrome"],"who_is_affected":"Any Chrome installation older than 157.0.8103.78 is exposed when a user opens a crafted page. Users who only run a managed or updated browser version at or above the fixed release are not affected.","user_interaction":"yes","product_ecosystem":"","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.0007,"input_tokens":4520,"output_tokens":496,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-126878':16A,19A '-2026':15A,18A '157.0.8103.78':28B,61C 'allow':62C 'attack':39B,65C 'browser':12A,20B 'chrome':1A,21B,26B,58C 'chromium':77C 'core':13A,35B,55C 'craft':2A,43B,74C 'cross':7A,69C 'cross-origin':6A,68C 'cve':14A,17A 'data':9A,48B,71C 'desktop':22B 'engin':36B 'googl':25B,57C 'high':80C 'html':3A,44B,75C 'inform':31B,52C 'leak':5A,32B,53C,67C 'mobil':23B 'origin':8A,70C 'page':4A,45B,76C 'prior':59C 'read':47B 'remot':38B,64C 'runtim':24B 'secur':78C 'sever':79C 'use':41B 'via':72C 'websit':51B","nicknames":[],"mitigations":[],"who_affected":"Any Chrome installation older than 157.0.8103.78 is exposed when a user opens a crafted page. Users who only run a managed or updated browser version at or above the fixed release are not affected.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Google Chrome to version 157.0.8103.78 or later through its built-in update check.","pkeys":[],"ptokens":[],"labels":["browser","chrome","desktop","high","mobile","runtime"],"campaign_type":null,"search_a":"'-126878':16A,19A '-2026':15A,18A 'browser':12A 'chrome':1A 'core':13A 'craft':2A 'cross':7A 'cross-origin':6A 'cve':14A,17A 'data':9A 'html':3A 'leak':5A 'origin':8A 'page':4A","search_b":"'157.0.8103.78':28B 'attack':39B 'browser':20B 'chrome':21B,26B 'core':35B 'craft':43B 'data':48B 'desktop':22B 'engin':36B 'googl':25B 'html':44B 'inform':31B 'leak':32B 'mobil':23B 'page':45B 'read':47B 'remot':38B 'runtim':24B 'use':41B 'websit':51B","search_c":"'157.0.8103.78':61C 'allow':62C 'attack':65C 'chrome':58C 'chromium':77C 'core':55C 'craft':74C 'cross':69C 'cross-origin':68C 'data':71C 'googl':57C 'high':80C 'html':75C 'inform':52C 'leak':53C,67C 'origin':70C 'page':76C 'prior':59C 'remot':64C 'secur':78C 'sever':79C 'via':72C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-11T23:17:16+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-126878","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126878","severity":null,"published_at":"2026-11-11T23:17:16+00:00","modified_at":"2026-11-11T23:17:16+00:00","first_seen_at":"2026-11-11T23:29:38+00:00","fetched_at":"2026-11-11T23:29:38+00:00","note":null}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}