{"id":"CVE-2026-126889","kind":"vulnerability","aliases":["CVE-2026-126889"],"related":[],"title":"Chrome: V8 off-by-one lets a crafted web page run code","description":"Off-by-one error in V8 in Google Chrome prior to 157.0.8103.78 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)","summary":"An off-by-one error in the V8 JavaScript engine of Google Chrome lets a remote attacker run arbitrary code inside the browser sandbox when the victim opens a crafted HTML page. Chromium rates it High severity.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","other","v8"],"not_affected_if":["chrome-updated"],"how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `chrome://version` in the address bar.\n- Compare the installed version with `157.0.8103.78`; anything older is exposed.","fix":"- Google Chrome: update to `157.0.8103.78` or later.","status":"open","published_at":"2026-11-11T23:17:18+00:00","first_seen_at":"2026-11-11T23:29:39+00:00","triaged_at":"2026-11-11T23:32:02+00:00","updated_at":"2026-11-11T23:32:02+00:00","category":"other","confidence":0.8,"triage":{"at":"2026-11-11T23:32:02Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: update to `157.0.8103.78` or later.","reach":"internet","title":"Chrome: V8 off-by-one lets a crafted web page run code","impact":"high","summary":"An off-by-one error in the V8 JavaScript engine of Google Chrome lets a remote attacker run arbitrary code inside the browser sandbox when the victim opens a crafted HTML page. Chromium rates it High severity.","audience":"everyone","category":"other","nicknames":[],"who_cares":["chrome","v8","browsers"],"confidence":0.8,"fix_status":"available","needs_auth":"no","worst_case":"Attacker runs code inside the browser sandbox via a crafted page","analyst_note":"","how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `chrome://version` in the address bar.\n- Compare the installed version with `157.0.8103.78`; anything older is exposed.","plain_action":"Update Google Chrome to version 157.0.8103.78 or later: open Chrome's menu, choose Help > About Google Chrome, and let it install.","product_name":"","needs_analyst":false,"not_affected_if":["chrome-updated"],"who_is_affected":"Any device running Google Chrome before 157.0.8103.78 is exposed when a user visits a malicious page. Sandbox escape is not stated, so the impact is limited to code execution inside the browser sandbox. Users on other browsers built on Chromium should check whether their vendor has shipped the same V8 fix.","user_interaction":"yes","product_ecosystem":"","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000741,"input_tokens":4535,"output_tokens":575,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-126889':16A,19A '-2026':15A,18A '157.0.8103.78':74C 'allow':75C 'arbitrari':43B,82C 'attack':41B,78C 'browser':20B,47B 'chrome':1A,21B,37B,71C 'chromium':57B,92C 'code':13A,44B,83C 'craft':9A,54B,89C 'cve':14A,17A 'engin':34B 'error':29B,66C 'execut':81C 'googl':36B,70C 'high':60B,95C 'html':55B,90C 'insid':45B,84C 'javascript':33B 'let':7A,38B 'off-by-on':3A,25B,62C 'one':6A,28B,65C 'open':52B 'page':11A,56B,91C 'potenti':80C 'prior':72C 'rate':58B 'remot':40B,77C 'run':12A,42B 'sandbox':48B,86C 'secur':93C 'sever':61B,94C 'v8':2A,23B,32B,68C 'via':87C 'victim':51B 'web':10A","nicknames":[],"mitigations":[],"who_affected":"Any device running Google Chrome before 157.0.8103.78 is exposed when a user visits a malicious page. Sandbox escape is not stated, so the impact is limited to code execution inside the browser sandbox. Users on other browsers built on Chromium should check whether their vendor has shipped the same V8 fix.","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: open Chrome's menu, choose Help > About Google Chrome, and let it install.","pkeys":[],"ptokens":[],"labels":["browsers","chrome","high","other","v8"],"campaign_type":null,"search_a":"'-126889':16A,19A '-2026':15A,18A 'chrome':1A 'code':13A 'craft':9A 'cve':14A,17A 'let':7A 'off-by-on':3A 'one':6A 'page':11A 'run':12A 'v8':2A 'web':10A","search_b":"'arbitrari':43B 'attack':41B 'browser':20B,47B 'chrome':21B,37B 'chromium':57B 'code':44B 'craft':54B 'engin':34B 'error':29B 'googl':36B 'high':60B 'html':55B 'insid':45B 'javascript':33B 'let':38B 'off-by-on':25B 'one':28B 'open':52B 'page':56B 'rate':58B 'remot':40B 'run':42B 'sandbox':48B 'sever':61B 'v8':23B,32B 'victim':51B","search_c":"'157.0.8103.78':74C 'allow':75C 'arbitrari':82C 'attack':78C 'chrome':71C 'chromium':92C 'code':83C 'craft':89C 'error':66C 'execut':81C 'googl':70C 'high':95C 'html':90C 'insid':84C 'off-by-on':62C 'one':65C 'page':91C 'potenti':80C 'prior':72C 'remot':77C 'sandbox':86C 'secur':93C 'sever':94C 'v8':68C 'via':87C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-11T23:17:18+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-126889","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126889","severity":null,"published_at":"2026-11-11T23:17:18+00:00","modified_at":"2026-11-11T23:17:18+00:00","first_seen_at":"2026-11-11T23:29:39+00:00","fetched_at":"2026-11-11T23:29:39+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"}