{"id":"CVE-2026-76028","kind":"vulnerability","aliases":["CVE-2026-76028"],"related":[],"title":"Chrome: use-after-free in FileSystem lets a crafted page run code","description":"Use after free in FileSystem in Google Chrome prior to 156.0.8078.79 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)","summary":"A use-after-free bug in the FileSystem component of Google Chrome before 156.0.8078.79 lets a remote attacker run arbitrary code inside the browser sandbox. The attack works through a crafted HTML page that a user opens.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","endpoints","runtime"],"not_affected_if":["already-on-156.0.8078.79-or-later"],"how_to_check":"- Open Chrome's About page (chrome://version) and compare the version to `156.0.8078.79`\n- On managed machines, check the installed Chrome version with the fleet or MDM inventory tool","fix":"- Google Chrome: move to `156.0.8078.79` or later","status":"open","published_at":"2026-10-30T01:16:47+00:00","first_seen_at":"2026-10-30T01:27:59+00:00","triaged_at":"2026-10-30T01:29:43+00:00","updated_at":"2026-10-30T01:29:43+00:00","category":"runtime","confidence":0.8,"triage":{"at":"2026-10-30T01:29:43Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `156.0.8078.79` or later","reach":"internet","title":"Chrome: use-after-free in FileSystem lets a crafted page run code","impact":"high","summary":"A use-after-free bug in the FileSystem component of Google Chrome before 156.0.8078.79 lets a remote attacker run arbitrary code inside the browser sandbox. The attack works through a crafted HTML page that a user opens.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browsers","endpoints"],"confidence":0.8,"fix_status":"available","needs_auth":"no","worst_case":"Attacker runs code inside the browser sandbox after a page visit","analyst_note":"","how_to_check":"- Open Chrome's About page (chrome://version) and compare the version to `156.0.8078.79`\n- On managed machines, check the installed Chrome version with the fleet or MDM inventory tool","plain_action":"Update Google Chrome to version 156.0.8078.79 or later, then restart the browser.","needs_analyst":false,"not_affected_if":["already-on-156.0.8078.79-or-later"],"who_is_affected":"Any device running Google Chrome before 156.0.8078.79 is exposed when a user visits a malicious or compromised web page. Chromium-based browsers that pick up the same fix are also affected until they update. Managed fleets should check version inventory rather than assume auto-update has run.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000681,"input_tokens":4104,"output_tokens":541,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':15A,18A '-76028':16A,19A '156.0.8078.79':38B,72C 'allow':73C 'arbitrari':44B,79C 'attack':42B,51B,76C 'browser':20B,48B 'bug':29B 'chrome':1A,21B,36B,69C 'chromium':89C 'code':13A,45B,80C 'compon':33B 'craft':10A,55B,86C 'cve':14A,17A 'endpoint':22B 'execut':78C 'filesystem':7A,32B,66C 'free':5A,28B,64C 'googl':35B,68C 'high':92C 'html':56B,87C 'insid':46B,81C 'let':8A,39B 'open':61B 'page':11A,57B,88C 'prior':70C 'remot':41B,75C 'run':12A,43B 'runtim':23B 'sandbox':49B,83C 'secur':90C 'sever':91C 'use':3A,26B,62C 'use-after-fre':2A,25B 'user':60B 'via':84C 'work':52B","nicknames":[],"mitigations":[],"who_affected":"Any device running Google Chrome before 156.0.8078.79 is exposed when a user visits a malicious or compromised web page. Chromium-based browsers that pick up the same fix are also affected until they update. Managed fleets should check version inventory rather than assume auto-update has run.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Google Chrome to version 156.0.8078.79 or later, then restart the browser.","first_public_at":"2026-10-30T01:16:47+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-76028","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-76028","severity":null,"published_at":"2026-10-30T01:16:47+00:00","modified_at":"2026-10-30T01:16:47+00:00","first_seen_at":"2026-10-30T01:27:59+00:00","fetched_at":"2026-10-30T01:27:59+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"}