{"id":"CVE-2026-126900","kind":"vulnerability","aliases":["CVE-2026-126900"],"related":[],"title":"Google Chrome: CSS use-after-free lets a crafted web page run code","description":"Use after free in CSS in Google Chrome prior to 157.0.8103.78 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)","summary":"A use-after-free bug in Chrome's CSS handling lets a remote attacker run arbitrary code inside the browser sandbox when a 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":["browser","chrome","desktop","other"],"not_affected_if":["already-updated"],"how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `google-chrome --version` on Linux\n- Compare the installed version with `157.0.8103.78`","fix":"- Google Chrome: move to `157.0.8103.78` or later","status":"open","published_at":"2026-11-11T23:17:19+00:00","first_seen_at":"2026-11-11T23:29:39+00:00","triaged_at":"2026-11-11T23:31:50+00:00","updated_at":"2026-11-11T23:31:50+00:00","category":"other","confidence":0.8,"triage":{"at":"2026-11-11T23:31:50Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.78` or later","reach":"internet","title":"Google Chrome: CSS use-after-free lets a crafted web page run code","impact":"high","summary":"A use-after-free bug in Chrome's CSS handling lets a remote attacker run arbitrary code inside the browser sandbox when a victim opens a crafted HTML page. Chromium rates it High severity.","audience":"everyone","category":"other","nicknames":[],"who_cares":["chrome","browser","desktop"],"confidence":0.8,"fix_status":"available","needs_auth":"no","worst_case":"Attacker runs code inside the browser sandbox after a victim visits a page","analyst_note":"","how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `google-chrome --version` on Linux\n- Compare the installed version with `157.0.8103.78`","plain_action":"Update Google Chrome to version 157.0.8103.78 or later: open the Chrome menu, go to Help > About Google Chrome, and let it install the update.","product_name":"","needs_analyst":false,"not_affected_if":["already-updated"],"who_is_affected":"Any desktop installation of Google Chrome prior to 157.0.8103.78 is exposed when a user visits a malicious page. Exploitation needs no account, but a person has to load the attacker's page. Chromium-based browsers that pick up the same fix are affected on their own release schedules.","user_interaction":"yes","product_ecosystem":"","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000721,"input_tokens":4529,"output_tokens":537,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-126900':17A,20A '-2026':16A,19A '157.0.8103.78':69C 'allow':70C 'arbitrari':40B,76C 'attack':38B,73C 'browser':21B,44B 'bug':29B 'chrome':2A,22B,31B,66C 'chromium':54B,86C 'code':14A,41B,77C 'craft':10A,51B,83C 'css':3A,33B,63C 'cve':15A,18A 'desktop':23B 'execut':75C 'free':7A,28B,61C 'googl':1A,65C 'handl':34B 'high':57B,89C 'html':52B,84C 'insid':42B,78C 'let':8A,35B 'open':49B 'page':12A,53B,85C 'prior':67C 'rate':55B 'remot':37B,72C 'run':13A,39B 'sandbox':45B,80C 'secur':87C 'sever':58B,88C 'use':5A,26B,59C 'use-after-fre':4A,25B 'via':81C 'victim':48B 'web':11A","nicknames":[],"mitigations":[],"who_affected":"Any desktop installation of Google Chrome prior to 157.0.8103.78 is exposed when a user visits a malicious page. Exploitation needs no account, but a person has to load the attacker's page. Chromium-based browsers that pick up the same fix are affected on their own release schedules.","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 the Chrome menu, go to Help > About Google Chrome, and let it install the update.","pkeys":[],"ptokens":[],"labels":["browser","chrome","desktop","high","other"],"campaign_type":null,"search_a":"'-126900':17A,20A '-2026':16A,19A 'chrome':2A 'code':14A 'craft':10A 'css':3A 'cve':15A,18A 'free':7A 'googl':1A 'let':8A 'page':12A 'run':13A 'use':5A 'use-after-fre':4A 'web':11A","search_b":"'arbitrari':40B 'attack':38B 'browser':21B,44B 'bug':29B 'chrome':22B,31B 'chromium':54B 'code':41B 'craft':51B 'css':33B 'desktop':23B 'free':28B 'handl':34B 'high':57B 'html':52B 'insid':42B 'let':35B 'open':49B 'page':53B 'rate':55B 'remot':37B 'run':39B 'sandbox':45B 'sever':58B 'use':26B 'use-after-fre':25B 'victim':48B","search_c":"'157.0.8103.78':69C 'allow':70C 'arbitrari':76C 'attack':73C 'chrome':66C 'chromium':86C 'code':77C 'craft':83C 'css':63C 'execut':75C 'free':61C 'googl':65C 'high':89C 'html':84C 'insid':78C 'page':85C 'prior':67C 'remot':72C 'sandbox':80C 'secur':87C 'sever':88C 'use':59C 'via':81C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-11T23:17:19+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-126900","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126900","severity":null,"published_at":"2026-11-11T23:17:19+00:00","modified_at":"2026-11-11T23:17:19+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"}