{"id":"CVE-2026-126883","kind":"vulnerability","aliases":["CVE-2026-126883"],"related":[],"title":"Chrome on Windows: use-after-free lets a compromised renderer escape sandbox","description":"Use after free in Core in Google Chrome on on Windows prior to 157.0.8103.78 allowed a remote attacker who had compromised the renderer process to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)","summary":"A use-after-free bug in Chrome's Core component on Windows lets an attacker who already controls the renderer process run arbitrary code outside the browser sandbox. The attacker delivers the trigger through a crafted HTML page.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","other","windows"],"not_affected_if":["chrome-updated","non-windows"],"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 against `157.0.8103.78`","fix":"- Google Chrome on Windows: update to `157.0.8103.78` or later","status":"open","published_at":"2026-11-11T23:17:17+00:00","first_seen_at":"2026-11-11T23:29:38+00:00","triaged_at":"2026-11-11T23:32:08+00:00","updated_at":"2026-11-11T23:32:08+00:00","category":"other","confidence":0.7,"triage":{"at":"2026-11-11T23:32:08Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome on Windows: update to `157.0.8103.78` or later","reach":"internet","title":"Chrome on Windows: use-after-free lets a compromised renderer escape sandbox","impact":"high","summary":"A use-after-free bug in Chrome's Core component on Windows lets an attacker who already controls the renderer process run arbitrary code outside the browser sandbox. The attacker delivers the trigger through a crafted HTML page.","audience":"everyone","category":"other","nicknames":[],"who_cares":["chrome","windows","browser"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"Attacker runs arbitrary code outside the browser sandbox on the machine","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 against `157.0.8103.78`","plain_action":"Update Google Chrome on your Windows computer to version 157.0.8103.78 or later.","product_name":"","needs_analyst":false,"not_affected_if":["chrome-updated","non-windows"],"who_is_affected":"Any Windows machine running Chrome older than 157.0.8103.78 is exposed when a user visits a malicious page. Exploitation requires a separate renderer compromise first, so the risk is chained. Managed fleets should confirm the deployed Chrome version.","user_interaction":"yes","product_ecosystem":"","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000725,"input_tokens":4540,"output_tokens":542,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-126883':16A,19A '-2026':15A,18A '157.0.8103.78':76C 'allow':77C 'alreadi':41B 'arbitrari':47B,89C 'attack':39B,54B,80C 'browser':20B,51B 'bug':29B 'chrome':1A,21B,31B,70C 'chromium':99C 'code':48B,90C 'compon':34B 'compromis':10A,83C 'control':42B 'core':33B,67C 'craft':60B,96C 'cve':14A,17A 'deliv':55B 'escap':12A 'execut':88C 'free':7A,28B,65C 'googl':69C 'high':102C 'html':61B,97C 'let':8A,37B 'outsid':49B,91C 'page':62B,98C 'prior':74C 'process':45B,86C 'remot':79C 'render':11A,44B,85C 'run':46B 'sandbox':13A,52B,93C 'secur':100C 'sever':101C 'trigger':57B 'use':5A,26B,63C 'use-after-fre':4A,25B 'via':94C 'window':3A,23B,36B,73C","nicknames":[],"mitigations":[],"who_affected":"Any Windows machine running Chrome older than 157.0.8103.78 is exposed when a user visits a malicious page. Exploitation requires a separate renderer compromise first, so the risk is chained. Managed fleets should confirm the deployed Chrome version.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Google Chrome on your Windows computer to version 157.0.8103.78 or later.","pkeys":[],"ptokens":[],"labels":["browser","chrome","high","other","windows"],"campaign_type":null,"search_a":"'-126883':16A,19A '-2026':15A,18A 'chrome':1A 'compromis':10A 'cve':14A,17A 'escap':12A 'free':7A 'let':8A 'render':11A 'sandbox':13A 'use':5A 'use-after-fre':4A 'window':3A","search_b":"'alreadi':41B 'arbitrari':47B 'attack':39B,54B 'browser':20B,51B 'bug':29B 'chrome':21B,31B 'code':48B 'compon':34B 'control':42B 'core':33B 'craft':60B 'deliv':55B 'free':28B 'html':61B 'let':37B 'outsid':49B 'page':62B 'process':45B 'render':44B 'run':46B 'sandbox':52B 'trigger':57B 'use':26B 'use-after-fre':25B 'window':23B,36B","search_c":"'157.0.8103.78':76C 'allow':77C 'arbitrari':89C 'attack':80C 'chrome':70C 'chromium':99C 'code':90C 'compromis':83C 'core':67C 'craft':96C 'execut':88C 'free':65C 'googl':69C 'high':102C 'html':97C 'outsid':91C 'page':98C 'prior':74C 'process':86C 'remot':79C 'render':85C 'sandbox':93C 'secur':100C 'sever':101C 'use':63C 'via':94C 'window':73C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-11T23:17:17+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-126883","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126883","severity":null,"published_at":"2026-11-11T23:17:17+00:00","modified_at":"2026-11-11T23:17:17+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"}