{"id":"CVE-2026-126856","kind":"vulnerability","aliases":["CVE-2026-126856"],"related":[],"title":"Google Chrome: incomplete cache cleanup leaks cross-origin data from a web page","description":"Incomplete cleanup in Cache in Google Chrome prior to 157.0.8103.78 allowed a remote attacker to obtain cross-origin data via a crafted HTML page. (Chromium security severity: High)","summary":"Google Chrome before 157.0.8103.78 did not fully clean up its cache, so a crafted HTML page can read data from other websites. Chromium rates it High severity.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","end-users","other"],"not_affected_if":["chrome-updated","other-browsers"],"how_to_check":"- Open Chrome and check the version under Settings > About Chrome; the flaw affects versions before `157.0.8103.78`.","fix":"- Google Chrome: `157.0.8103.78`","status":"open","published_at":"2026-11-11T23:17:13+00:00","first_seen_at":"2026-11-11T23:29:36+00:00","triaged_at":"2026-11-11T23:33:32+00:00","updated_at":"2026-11-11T23:33:32+00:00","category":"other","confidence":0.7,"triage":{"at":"2026-11-11T23:33:32Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: `157.0.8103.78`","reach":"internet","title":"Google Chrome: incomplete cache cleanup leaks cross-origin data from a web page","impact":"medium","summary":"Google Chrome before 157.0.8103.78 did not fully clean up its cache, so a crafted HTML page can read data from other websites. Chromium rates it High severity.","audience":"everyone","category":"other","nicknames":[],"who_cares":["chrome","browsers","end-users"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"A malicious web page reads cross-origin data from other sites.","analyst_note":"","how_to_check":"- Open Chrome and check the version under Settings > About Chrome; the flaw affects versions before `157.0.8103.78`.","plain_action":"Update Google Chrome to version 157.0.8103.78 or later through its settings menu.","product_name":"","needs_analyst":false,"not_affected_if":["chrome-updated","other-browsers"],"who_is_affected":"Anyone running Google Chrome before 157.0.8103.78 who visits a malicious or compromised web page. The sources do not describe any server-side or non-browser exposure, so teams that only run servers are unlikely to be affected.","user_interaction":"yes","product_ecosystem":"","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.00069,"input_tokens":4533,"output_tokens":473,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-126856':17A,20A '-2026':16A,19A '157.0.8103.78':29B,62C 'allow':63C 'attack':66C 'browser':21B 'cach':4A,36B,56C 'chrome':2A,22B,27B,59C 'chromium':48B,78C 'clean':33B 'cleanup':5A,54C 'craft':39B,75C 'cross':8A,70C 'cross-origin':7A,69C 'cve':15A,18A 'data':10A,44B,72C 'end':24B 'end-us':23B 'fulli':32B 'googl':1A,26B,58C 'high':51B,81C 'html':40B,76C 'incomplet':3A,53C 'leak':6A 'obtain':68C 'origin':9A,71C 'page':14A,41B,77C 'prior':60C 'rate':49B 'read':43B 'remot':65C 'secur':79C 'sever':52B,80C 'user':25B 'via':73C 'web':13A 'websit':47B","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before 157.0.8103.78 who visits a malicious or compromised web page. The sources do not describe any server-side or non-browser exposure, so teams that only run servers are unlikely to be 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 settings menu.","pkeys":[],"ptokens":[],"labels":["browsers","chrome","endusers","high","other"],"campaign_type":null,"search_a":"'-126856':17A,20A '-2026':16A,19A 'cach':4A 'chrome':2A 'cleanup':5A 'cross':8A 'cross-origin':7A 'cve':15A,18A 'data':10A 'googl':1A 'incomplet':3A 'leak':6A 'origin':9A 'page':14A 'web':13A","search_b":"'157.0.8103.78':29B 'browser':21B 'cach':36B 'chrome':22B,27B 'chromium':48B 'clean':33B 'craft':39B 'data':44B 'end':24B 'end-us':23B 'fulli':32B 'googl':26B 'high':51B 'html':40B 'page':41B 'rate':49B 'read':43B 'sever':52B 'user':25B 'websit':47B","search_c":"'157.0.8103.78':62C 'allow':63C 'attack':66C 'cach':56C 'chrome':59C 'chromium':78C 'cleanup':54C 'craft':75C 'cross':70C 'cross-origin':69C 'data':72C 'googl':58C 'high':81C 'html':76C 'incomplet':53C 'obtain':68C 'origin':71C 'page':77C 'prior':60C 'remot':65C 'secur':79C 'sever':80C 'via':73C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-11T23:17:13+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-126856","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126856","severity":null,"published_at":"2026-11-11T23:17:13+00:00","modified_at":"2026-11-11T23:17:13+00:00","first_seen_at":"2026-11-11T23:29:36+00:00","fetched_at":"2026-11-11T23:29:36+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"}