{"id":"CVE-2026-121237","kind":"vulnerability","aliases":["CVE-2026-121237"],"related":[],"title":"Google Chrome: crafted web page bypasses file access restrictions","description":"Improper state validation in FileSystem in Google Chrome prior to 157.0.8103.38 allowed a remote attacker leveraging social engineering to bypass system access restrictions via a crafted HTML page. (Chromium security severity: Medium)","summary":"Chrome's FileSystem component does not properly validate state, so a crafted HTML page can bypass system access restrictions. An attacker must lure a user to the page through social engineering.","severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","other"],"not_affected_if":["chrome-at-or-above-157.0.8103.38"],"how_to_check":"- Check the installed Chrome version (`chrome://settings/help`) and compare it with `157.0.8103.38`.","fix":"- Google Chrome: move to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:33+00:00","first_seen_at":"2026-11-03T21:19:28+00:00","triaged_at":"2026-11-03T21:21:12+00:00","updated_at":"2026-11-03T21:21:12+00:00","category":"other","confidence":0.7,"triage":{"at":"2026-11-03T21:21:12Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later.","reach":"internet","title":"Google Chrome: crafted web page bypasses file access restrictions","impact":"medium","summary":"Chrome's FileSystem component does not properly validate state, so a crafted HTML page can bypass system access restrictions. An attacker must lure a user to the page through social engineering.","audience":"everyone","category":"other","nicknames":[],"who_cares":["chrome","desktop","browser"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"A crafted web page bypasses system file access restrictions in the browser.","analyst_note":"","how_to_check":"- Check the installed Chrome version (`chrome://settings/help`) and compare it with `157.0.8103.38`.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later, and avoid opening links from unknown senders.","needs_analyst":false,"not_affected_if":["chrome-at-or-above-157.0.8103.38"],"who_is_affected":"Anyone running Google Chrome before 157.0.8103.38 is exposed when they visit a crafted page. The sources do not describe server-side or managed-deployment exposure beyond the browser itself.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000648,"input_tokens":4108,"output_tokens":475,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121237':12A,15A '-2026':11A,14A '157.0.8103.38':60C 'access':8A,36B,71C 'allow':61C 'attack':39B,64C 'browser':16B 'bypass':6A,34B,69C 'chrome':2A,17B,19B,57C 'chromium':78C 'compon':22B 'craft':3A,30B,75C 'cve':10A,13A 'desktop':18B 'engin':49B,67C 'file':7A 'filesystem':21B,54C 'googl':1A,56C 'html':31B,76C 'improp':50C 'leverag':65C 'lure':41B 'medium':81C 'must':40B 'page':5A,32B,46B,77C 'prior':58C 'proper':25B 'remot':63C 'restrict':9A,37B,72C 'secur':79C 'sever':80C 'social':48B,66C 'state':27B,51C 'system':35B,70C 'user':43B 'valid':26B,52C 'via':73C 'web':4A","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before 157.0.8103.38 is exposed when they visit a crafted page. The sources do not describe server-side or managed-deployment exposure beyond the browser itself.","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, and avoid opening links from unknown senders.","pkeys":[],"ptokens":[],"labels":["browser","chrome","desktop","medium","other"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:33+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121237","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121237","severity":null,"published_at":"2026-11-03T21:17:33+00:00","modified_at":"2026-11-03T21:17:33+00:00","first_seen_at":"2026-11-03T21:19:28+00:00","fetched_at":"2026-11-03T21:19:28+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"}