{"id":"CVE-2026-121071","kind":"vulnerability","aliases":["CVE-2026-121071"],"related":[],"title":"Chrome: incorrect authorization in FileSystem lets a crafted page escape sandbox","description":"Incorrect authorization in FileSystem in Google Chrome prior to 157.0.8103.38 allowed a remote attacker leveraging social engineering to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)","summary":"Google Chrome before 157.0.8103.38 has an incorrect authorization flaw in its FileSystem component. A remote attacker who tricks a user into opening a crafted HTML page could potentially execute arbitrary code outside the browser sandbox.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","desktop-users","package"],"not_affected_if":["chrome-already-updated"],"how_to_check":"- Check the installed Chrome version in the browser's About page or with `chrome://version`; anything older than `157.0.8103.38` is affected.","fix":"- Google Chrome: update to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:12+00:00","first_seen_at":"2026-11-03T21:19:11+00:00","triaged_at":"2026-11-03T21:26:56+00:00","updated_at":"2026-11-03T21:26:56+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-11-03T21:26:56Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: update to `157.0.8103.38` or later.","reach":"internet","title":"Chrome: incorrect authorization in FileSystem lets a crafted page escape sandbox","impact":"high","summary":"Google Chrome before 157.0.8103.38 has an incorrect authorization flaw in its FileSystem component. A remote attacker who tricks a user into opening a crafted HTML page could potentially execute arbitrary code outside the browser sandbox.","audience":"everyone","category":"package","nicknames":[],"who_cares":["chrome","browsers","desktop-users"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"Attacker runs arbitrary code outside the browser sandbox on the user's machine.","analyst_note":"Confirm the fixed version and whether other Chromium browsers are affected via the Chrome release notes or NVD entry.","how_to_check":"- Check the installed Chrome version in the browser's About page or with `chrome://version`; anything older than `157.0.8103.38` is affected.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later.","needs_analyst":true,"not_affected_if":["chrome-already-updated"],"who_is_affected":"Anyone running Google Chrome before 157.0.8103.38 who visits a malicious page. Exploitation needs social engineering to get the user to a crafted page. Chromium-based browsers may need their own updates and are not covered by the source.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000687,"input_tokens":4119,"output_tokens":551,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121071':14A,17A '-2026':13A,16A '157.0.8103.38':27B,68C 'allow':69C 'arbitrari':53B,79C 'attack':39B,72C 'author':3A,31B,60C 'browser':18B,57B 'chrome':1A,19B,25B,65C 'chromium':89C 'code':54B,80C 'compon':36B 'could':50B 'craft':8A,47B,86C 'cve':12A,15A 'desktop':21B 'desktop-us':20B 'engin':75C 'escap':10A 'execut':52B,78C 'filesystem':5A,35B,62C 'flaw':32B 'googl':24B,64C 'high':92C 'html':48B,87C 'incorrect':2A,30B,59C 'let':6A 'leverag':73C 'open':45B 'outsid':55B,81C 'packag':23B 'page':9A,49B,88C 'potenti':51B,77C 'prior':66C 'remot':38B,71C 'sandbox':11A,58B,83C 'secur':90C 'sever':91C 'social':74C 'trick':41B 'user':22B,43B 'via':84C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before 157.0.8103.38 who visits a malicious page. Exploitation needs social engineering to get the user to a crafted page. Chromium-based browsers may need their own updates and are not covered by the source.","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.","pkeys":[],"ptokens":[],"labels":["browsers","chrome","desktopusers","high","package"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:12+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121071","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121071","severity":null,"published_at":"2026-11-03T21:17:12+00:00","modified_at":"2026-11-03T21:17:12+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"}