{"id":"CVE-2026-121064","kind":"vulnerability","aliases":["CVE-2026-121064"],"related":[],"title":"Google Chrome: input validation flaw lets local program escape sandbox","description":"Improper input validation in Performance in Google Chrome prior to 157.0.8103.38 allowed a local attacker to potentially execute arbitrary code inside the sandbox via a local program. (Chromium security severity: Low)","summary":"Google Chrome has an improper input validation flaw in its Performance component. A local program can use it to potentially execute arbitrary code inside the browser sandbox.","severity":"low","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","package"],"not_affected_if":["chrome-157.0.8103.38-or-later","no-local-untrusted-code"],"how_to_check":"- Check the installed Chrome version in the browser's About page or with `chrome --version`\n- Confirm whether it is older than `157.0.8103.38`","fix":"- Google Chrome: move to `157.0.8103.38` or later","status":"open","published_at":"2026-11-03T21:17:11+00:00","first_seen_at":"2026-11-03T21:19:11+00:00","triaged_at":"2026-11-03T21:27:04+00:00","updated_at":"2026-11-03T21:27:04+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-11-03T21:27:04Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later","reach":"local","title":"Google Chrome: input validation flaw lets local program escape sandbox","impact":"medium","summary":"Google Chrome has an improper input validation flaw in its Performance component. A local program can use it to potentially execute arbitrary code inside the browser sandbox.","audience":"everyone","category":"package","nicknames":[],"who_cares":["chrome","desktop","browser"],"confidence":0.6,"fix_status":"available","needs_auth":"unknown","worst_case":"Code runs inside the browser sandbox via a local program","analyst_note":"","how_to_check":"- Check the installed Chrome version in the browser's About page or with `chrome --version`\n- Confirm whether it is older than `157.0.8103.38`","plain_action":"Update Google Chrome to version 157.0.8103.38 or later.","needs_analyst":false,"not_affected_if":["chrome-157.0.8103.38-or-later","no-local-untrusted-code"],"who_is_affected":"Anyone running Google Chrome before 157.0.8103.38 on a machine where a local program could run. The attacker must already have local code execution, so exposure is limited to shared or compromised machines. Managed fleets should confirm Chrome auto-update is working.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"low"},"cost_usd":0.000655,"input_tokens":4094,"output_tokens":491,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121064':13A,16A '-2026':12A,15A '157.0.8103.38':58C 'allow':59C 'arbitrari':42B,66C 'attack':62C 'browser':17B,46B 'chrome':2A,18B,22B,55C 'chromium':75C 'code':43B,67C 'compon':32B 'cve':11A,14A 'desktop':19B 'escap':9A 'execut':41B,65C 'flaw':5A,28B 'googl':1A,21B,54C 'improp':25B,48C 'input':3A,26B,49C 'insid':44B,68C 'let':6A 'local':7A,34B,61C,73C 'low':78C 'packag':20B 'perform':31B,52C 'potenti':40B,64C 'prior':56C 'program':8A,35B,74C 'sandbox':10A,47B,70C 'secur':76C 'sever':77C 'use':37B 'valid':4A,27B,50C 'via':71C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before 157.0.8103.38 on a machine where a local program could run. The attacker must already have local code execution, so exposure is limited to shared or compromised machines. Managed fleets should confirm Chrome auto-update is working.","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.","pkeys":[],"ptokens":[],"labels":["browser","chrome","desktop","low","package"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:11+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121064","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121064","severity":null,"published_at":"2026-11-03T21:17:11+00:00","modified_at":"2026-11-03T21:17:11+00:00","first_seen_at":"2026-11-03T21:19:11+00:00","fetched_at":"2026-11-03T21:19:11+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"}