{"id":"CVE-2026-121178","kind":"vulnerability","aliases":["CVE-2026-121178"],"related":[],"title":"Chrome: use-after-free in Aura lets a compromised renderer escape sandbox","description":"Use after free in Aura in Google Chrome prior to 157.0.8103.38 allowed a remote attacker who had compromised the renderer process to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)","summary":"A use-after-free bug in Aura, Chrome's windowing layer, can be triggered from a crafted HTML page by an attacker who already controls the renderer process. Successful exploitation could run arbitrary code outside the browser sandbox.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","desktop","package"],"not_affected_if":["chrome-up-to-date"],"how_to_check":"- Check the installed Chrome version: `chrome://settings/help` or `google-chrome --version`\n- Compare it against the fixed version `157.0.8103.38`","fix":"- Google Chrome: move to `157.0.8103.38` or later","status":"open","published_at":"2026-11-03T21:17:26+00:00","first_seen_at":"2026-11-03T21:19:24+00:00","triaged_at":"2026-11-03T21:23:11+00:00","updated_at":"2026-11-03T21:23:11+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-11-03T21:23:11Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later","reach":"internet","title":"Chrome: use-after-free in Aura lets a compromised renderer escape sandbox","impact":"high","summary":"A use-after-free bug in Aura, Chrome's windowing layer, can be triggered from a crafted HTML page by an attacker who already controls the renderer process. Successful exploitation could run arbitrary code outside the browser sandbox.","audience":"everyone","category":"package","nicknames":[],"who_cares":["chrome","browsers","desktop"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"Attacker runs arbitrary code outside the Chrome sandbox on the machine","analyst_note":"","how_to_check":"- Check the installed Chrome version: `chrome://settings/help` or `google-chrome --version`\n- Compare it against the fixed version `157.0.8103.38`","plain_action":"Update Google Chrome to version 157.0.8103.38 or later: Chrome menu > Help > About Google Chrome.","needs_analyst":false,"not_affected_if":["chrome-up-to-date"],"who_is_affected":"Anyone running Google Chrome older than 157.0.8103.38 on desktop platforms that use Aura is potentially exposed. The attack needs a renderer compromise first, so it is a chained exploit that starts with a malicious web page. Managed fleets should confirm the Chrome build across all machines.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000686,"input_tokens":4111,"output_tokens":550,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121178':16A,19A '-2026':15A,18A '157.0.8103.38':73C 'allow':74C 'alreadi':48B 'arbitrari':57B,87C 'attack':46B,77C 'aura':7A,31B,67C 'browser':20B,61B 'bug':29B 'chrome':1A,21B,32B,70C 'chromium':97C 'code':58B,88C 'compromis':10A,80C 'control':49B 'could':55B 'craft':41B,94C 'cve':14A,17A 'desktop':22B 'escap':12A 'execut':86C 'exploit':54B 'free':5A,28B,65C 'googl':69C 'high':100C 'html':42B,95C 'layer':35B 'let':8A 'outsid':59B,89C 'packag':23B 'page':43B,96C 'potenti':85C 'prior':71C 'process':52B,83C 'remot':76C 'render':11A,51B,82C 'run':56B 'sandbox':13A,62B,91C 'secur':98C 'sever':99C 'success':53B 'trigger':38B 'use':3A,26B,63C 'use-after-fre':2A,25B 'via':92C 'window':34B","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome older than 157.0.8103.38 on desktop platforms that use Aura is potentially exposed. The attack needs a renderer compromise first, so it is a chained exploit that starts with a malicious web page. Managed fleets should confirm the Chrome build across all machines.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Google Chrome to version 157.0.8103.38 or later: Chrome menu > Help > About Google Chrome.","pkeys":[],"ptokens":[],"labels":["browsers","chrome","desktop","high","package"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:26+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121178","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121178","severity":null,"published_at":"2026-11-03T21:17:26+00:00","modified_at":"2026-11-03T21:17:26+00:00","first_seen_at":"2026-11-03T21:19:24+00:00","fetched_at":"2026-11-03T21:19:24+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}