{"id":"CVE-2026-126906","kind":"vulnerability","aliases":["CVE-2026-126906"],"related":[],"title":"Google Chrome on Mac: extensions race condition leaks sensitive information","description":"Race condition in Extensions in Google Chrome on on Mac prior to 157.0.8103.78 allowed a remote attacker who had compromised the renderer process to obtain sensitive information via crafted network traffic. (Chromium security severity: High)","summary":"A race condition in Chrome's Extensions component on macOS lets a remote attacker who has already compromised the renderer process obtain sensitive information through crafted network traffic. The sources rate it High in Chromium's security scale.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser-users","chrome","macos","other"],"not_affected_if":["chrome-updated","non-mac-platform"],"how_to_check":"- Open Chrome and go to `chrome://settings/help` to read the installed version\n- Confirm the version is `157.0.8103.78` or later","fix":"- Google Chrome on Mac: move to `157.0.8103.78` or later","status":"open","published_at":"2026-11-11T23:17:20+00:00","first_seen_at":"2026-11-11T23:29:40+00:00","triaged_at":"2026-11-11T23:31:44+00:00","updated_at":"2026-11-11T23:31:44+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-11-11T23:31:44Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome on Mac: move to `157.0.8103.78` or later","reach":"internet","title":"Google Chrome on Mac: extensions race condition leaks sensitive information","impact":"low","summary":"A race condition in Chrome's Extensions component on macOS lets a remote attacker who has already compromised the renderer process obtain sensitive information through crafted network traffic. The sources rate it High in Chromium's security scale.","audience":"everyone","category":"other","nicknames":[],"who_cares":["chrome","macos","browser-users"],"confidence":0.6,"fix_status":"available","needs_auth":"unknown","worst_case":"attacker reads sensitive information after compromising the renderer process","analyst_note":"","how_to_check":"- Open Chrome and go to `chrome://settings/help` to read the installed version\n- Confirm the version is `157.0.8103.78` or later","plain_action":"Update Google Chrome on your Mac to version 157.0.8103.78 or later: Chrome menu > About Google Chrome.","product_name":"","needs_analyst":false,"not_affected_if":["chrome-updated","non-mac-platform"],"who_is_affected":"Chrome on macOS before 157.0.8103.78 is affected. The attacker must first have compromised the renderer process, which is a chained attack rather than a direct one. Chrome on Windows, Linux and mobile are not named in the sources.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000714,"input_tokens":4536,"output_tokens":520,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-126906':13A,16A '-2026':12A,15A '157.0.8103.78':72C 'allow':73C 'alreadi':38B 'attack':35B,76C 'browser':18B 'browser-us':17B 'chrome':2A,20B,26B,66C 'chromium':56B,91C 'compon':29B 'compromis':39B,79C 'condit':7A,24B,61C 'craft':47B,88C 'cve':11A,14A 'extens':5A,28B,63C 'googl':1A,65C 'high':54B,94C 'inform':10A,45B,86C 'leak':8A 'let':32B 'mac':4A,69C 'maco':21B,31B 'network':48B,89C 'obtain':43B,84C 'prior':70C 'process':42B,82C 'race':6A,23B,60C 'rate':52B 'remot':34B,75C 'render':41B,81C 'scale':59B 'secur':58B,92C 'sensit':9A,44B,85C 'sever':93C 'sourc':51B 'traffic':49B,90C 'user':19B 'via':87C","nicknames":[],"mitigations":[],"who_affected":"Chrome on macOS before 157.0.8103.78 is affected. The attacker must first have compromised the renderer process, which is a chained attack rather than a direct one. Chrome on Windows, Linux and mobile are not named in the sources.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Google Chrome on your Mac to version 157.0.8103.78 or later: Chrome menu > About Google Chrome.","pkeys":[],"ptokens":[],"labels":["browserusers","chrome","high","macos","other"],"campaign_type":null,"search_a":"'-126906':13A,16A '-2026':12A,15A 'chrome':2A 'condit':7A 'cve':11A,14A 'extens':5A 'googl':1A 'inform':10A 'leak':8A 'mac':4A 'race':6A 'sensit':9A","search_b":"'alreadi':38B 'attack':35B 'browser':18B 'browser-us':17B 'chrome':20B,26B 'chromium':56B 'compon':29B 'compromis':39B 'condit':24B 'craft':47B 'extens':28B 'high':54B 'inform':45B 'let':32B 'maco':21B,31B 'network':48B 'obtain':43B 'process':42B 'race':23B 'rate':52B 'remot':34B 'render':41B 'scale':59B 'secur':58B 'sensit':44B 'sourc':51B 'traffic':49B 'user':19B","search_c":"'157.0.8103.78':72C 'allow':73C 'attack':76C 'chrome':66C 'chromium':91C 'compromis':79C 'condit':61C 'craft':88C 'extens':63C 'googl':65C 'high':94C 'inform':86C 'mac':69C 'network':89C 'obtain':84C 'prior':70C 'process':82C 'race':60C 'remot':75C 'render':81C 'secur':92C 'sensit':85C 'sever':93C 'traffic':90C 'via':87C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-11T23:17:20+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-126906","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126906","severity":null,"published_at":"2026-11-11T23:17:20+00:00","modified_at":"2026-11-11T23:17:20+00:00","first_seen_at":"2026-11-11T23:29:40+00:00","fetched_at":"2026-11-11T23:29:40+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"}