{"id":"CVE-2026-126904","kind":"vulnerability","aliases":["CVE-2026-126904"],"related":[],"title":"Chrome: use-after-free in Compositing lets a crafted page escape the sandbox","description":"Use after free in Compositing in Google Chrome 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":"Google Chrome versions before 157.0.8103.78 have a use-after-free bug in the Compositing component. A remote attacker who has already compromised the renderer process can run arbitrary code outside the browser sandbox by serving a crafted HTML page.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","desktop","other"],"not_affected_if":["chrome-updated"],"how_to_check":"- Open Chrome and check the version under Settings > About Chrome; it should be `157.0.8103.78` or later.","fix":"- Google Chrome: 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":"2026-11-11T23:31:46+00:00","updated_at":"2026-11-11T23:31:46+00:00","category":"other","confidence":0.7,"triage":{"at":"2026-11-11T23:31:46Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.78` or later.","reach":"internet","title":"Chrome: use-after-free in Compositing lets a crafted page escape the sandbox","impact":"high","summary":"Google Chrome versions before 157.0.8103.78 have a use-after-free bug in the Compositing component. A remote attacker who has already compromised the renderer process can run arbitrary code outside the browser sandbox by serving a crafted HTML page.","audience":"everyone","category":"other","nicknames":[],"who_cares":["chrome","desktop","browsers"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"Attacker runs arbitrary code outside the browser sandbox on the machine","analyst_note":"Confirm the Chrome release notes and whether the Chromium bug is exploited in the wild; the sources given do not state a fix page or exploitation status.","how_to_check":"- Open Chrome and check the version under Settings > About Chrome; it should be `157.0.8103.78` or later.\n- unknown","plain_action":"Update Google Chrome to version 157.0.8103.78 or later.","product_name":"","needs_analyst":true,"not_affected_if":["chrome-updated"],"who_is_affected":"Anyone running Google Chrome before 157.0.8103.78 who visits untrusted web pages. The attack needs a renderer compromise first, so it is a chained exploit rather than a single page load. Organisations that manage browsers centrally should check their fleet version.","user_interaction":"yes","product_ecosystem":"","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000732,"input_tokens":4537,"output_tokens":557,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-126904':17A,20A '-2026':16A,19A '157.0.8103.78':28B,74C 'allow':75C 'alreadi':45B 'arbitrari':52B,87C 'attack':42B,78C 'browser':21B,56B 'bug':35B 'chrome':1A,22B,25B,71C 'chromium':97C 'code':53B,88C 'compon':39B 'composit':7A,38B,68C 'compromis':46B,81C 'craft':10A,61B,94C 'cve':15A,18A 'desktop':23B 'escap':12A 'execut':86C 'free':5A,34B,66C 'googl':24B,70C 'high':100C 'html':62B,95C 'let':8A 'outsid':54B,89C 'page':11A,63B,96C 'prior':72C 'process':49B,84C 'remot':41B,77C 'render':48B,83C 'run':51B 'sandbox':14A,57B,91C 'secur':98C 'serv':59B 'sever':99C 'use':3A,32B,64C 'use-after-fre':2A,31B 'version':26B 'via':92C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before 157.0.8103.78 who visits untrusted web pages. The attack needs a renderer compromise first, so it is a chained exploit rather than a single page load. Organisations that manage browsers centrally should check their fleet version.","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.","pkeys":[],"ptokens":[],"labels":["browsers","chrome","desktop","high","other"],"campaign_type":null,"search_a":"'-126904':17A,20A '-2026':16A,19A 'chrome':1A 'composit':7A 'craft':10A 'cve':15A,18A 'escap':12A 'free':5A 'let':8A 'page':11A 'sandbox':14A 'use':3A 'use-after-fre':2A","search_b":"'157.0.8103.78':28B 'alreadi':45B 'arbitrari':52B 'attack':42B 'browser':21B,56B 'bug':35B 'chrome':22B,25B 'code':53B 'compon':39B 'composit':38B 'compromis':46B 'craft':61B 'desktop':23B 'free':34B 'googl':24B 'html':62B 'outsid':54B 'page':63B 'process':49B 'remot':41B 'render':48B 'run':51B 'sandbox':57B 'serv':59B 'use':32B 'use-after-fre':31B 'version':26B","search_c":"'157.0.8103.78':74C 'allow':75C 'arbitrari':87C 'attack':78C 'chrome':71C 'chromium':97C 'code':88C 'composit':68C 'compromis':81C 'craft':94C 'execut':86C 'free':66C 'googl':70C 'high':100C 'html':95C 'outsid':89C 'page':96C 'prior':72C 'process':84C 'remot':77C 'render':83C 'sandbox':91C 'secur':98C 'sever':99C 'use':64C 'via':92C","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-2026-126904","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126904","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"}