{"id":"CVE-2026-121163","kind":"vulnerability","aliases":["CVE-2026-121163"],"related":[],"title":"Chrome: input validation flaw lets a compromised renderer escape sandbox","description":"Improper input validation in Browser in Google Chrome prior to 157.0.8103.38 allowed a remote attacker who had compromised the renderer process to execute arbitrary code outside the sandbox via crafted network traffic. (Chromium security severity: Medium)","summary":"Google Chrome before 157.0.8103.38 has an input validation flaw in its browser process. A remote attacker who already controls the renderer process can run arbitrary code outside the sandbox via crafted network traffic.","severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","package"],"not_affected_if":["chrome-up-to-date"],"how_to_check":"- Check the installed Chrome version at chrome://settings/help and compare it to `157.0.8103.38`\n- Check managed fleets for Chrome builds older than `157.0.8103.38`","fix":"- Google Chrome: move to `157.0.8103.38` or later","status":"open","published_at":"2026-11-03T21:17:24+00:00","first_seen_at":"2026-11-03T21:19:23+00:00","triaged_at":"2026-11-03T21:23:24+00:00","updated_at":"2026-11-03T21:23:24+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-11-03T21:23:24Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later","reach":"internet","title":"Chrome: input validation flaw lets a compromised renderer escape sandbox","impact":"high","summary":"Google Chrome before 157.0.8103.38 has an input validation flaw in its browser process. A remote attacker who already controls the renderer process can run arbitrary code outside the sandbox via crafted network traffic.","audience":"everyone","category":"package","nicknames":[],"who_cares":["chrome","browser","desktop"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"attacker runs arbitrary code outside the browser sandbox","analyst_note":"","how_to_check":"- Check the installed Chrome version at chrome://settings/help and compare it to `157.0.8103.38`\n- Check managed fleets for Chrome builds older than `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":"Any desktop installation of Chrome older than 157.0.8103.38 is affected. The attacker first needs to compromise the renderer process, so the exposure is a chained attack rather than a single bug. Managed fleets and anyone who does not auto-update should check their version.","user_interaction":"unknown","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000676,"input_tokens":4109,"output_tokens":530,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121163':13A,16A '-2026':12A,15A '157.0.8103.38':24B,64C 'allow':65C 'alreadi':38B 'arbitrari':45B,77C 'attack':36B,68C 'browser':17B,32B,58C 'chrome':1A,18B,22B,61C 'chromium':86C 'code':46B,78C 'compromis':7A,71C 'control':39B 'craft':51B,83C 'cve':11A,14A 'desktop':19B 'escap':9A 'execut':76C 'flaw':4A,29B 'googl':21B,60C 'improp':54C 'input':2A,27B,55C 'let':5A 'medium':89C 'network':52B,84C 'outsid':47B,79C 'packag':20B 'prior':62C 'process':33B,42B,74C 'remot':35B,67C 'render':8A,41B,73C 'run':44B 'sandbox':10A,49B,81C 'secur':87C 'sever':88C 'traffic':53B,85C 'valid':3A,28B,56C 'via':50B,82C","nicknames":[],"mitigations":[],"who_affected":"Any desktop installation of Chrome older than 157.0.8103.38 is affected. The attacker first needs to compromise the renderer process, so the exposure is a chained attack rather than a single bug. Managed fleets and anyone who does not auto-update should check their version.","tier":"C","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":["browser","chrome","desktop","medium","package"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:24+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121163","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121163","severity":null,"published_at":"2026-11-03T21:17:24+00:00","modified_at":"2026-11-03T21:17:24+00:00","first_seen_at":"2026-11-03T21:19:23+00:00","fetched_at":"2026-11-03T21:19:23+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"}