{"id":"CVE-2026-121076","kind":"vulnerability","aliases":["CVE-2026-121076"],"related":[],"title":"Chrome: WebXR use-after-free lets a crafted page run code outside the sandbox","description":"Use after free in WebXR in Google Chrome prior to 157.0.8103.38 allowed a remote attacker leveraging social engineering to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)","summary":"A memory-handling bug in WebXR in Google Chrome before 157.0.8103.38 lets a remote attacker run arbitrary code outside the browser sandbox. The attack needs a victim to visit a crafted HTML page, typically through social engineering.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","desktop-users","package"],"not_affected_if":["already-updated","non-chrome-browsers"],"how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `chrome://version` in the address bar.\n- Confirm the installed version is at least `157.0.8103.38`.","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":"2026-11-03T21:26:53+00:00","updated_at":"2026-11-03T21:26:53+00:00","category":"package","confidence":0.8,"triage":{"at":"2026-11-03T21:26:53Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: update to `157.0.8103.38` or later.","reach":"internet","title":"Chrome: WebXR use-after-free lets a crafted page run code outside the sandbox","impact":"high","summary":"A memory-handling bug in WebXR in Google Chrome before 157.0.8103.38 lets a remote attacker run arbitrary code outside the browser sandbox. The attack needs a victim to visit a crafted HTML page, typically through social engineering.","audience":"everyone","category":"package","nicknames":[],"who_cares":["chrome","browsers","desktop-users"],"confidence":0.8,"fix_status":"available","needs_auth":"no","worst_case":"Attacker runs arbitrary code outside the browser sandbox on the victim's machine.","analyst_note":"","how_to_check":"- Open Chrome and check the version under Settings > About Chrome, or run `chrome://version` in the address bar.\n- Confirm the installed version is at least `157.0.8103.38`.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later: open Chrome's menu, choose Help > About Google Chrome, and let it install.","needs_analyst":false,"not_affected_if":["already-updated","non-chrome-browsers"],"who_is_affected":"Anyone running Google Chrome before 157.0.8103.38 is exposed when they open a malicious web page. Servers and other systems that do not run Chrome as a browser are not affected. Managed fleets should confirm every browser install has the updated build.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000693,"input_tokens":4107,"output_tokens":565,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121076':18A,21A '-2026':17A,20A '157.0.8103.38':39B,76C 'allow':77C 'arbitrari':45B,86C 'attack':43B,52B,80C 'browser':22B,49B 'bug':32B 'chrome':1A,23B,37B,73C 'chromium':96C 'code':12A,46B,87C 'craft':9A,59B,93C 'cve':16A,19A 'desktop':25B 'desktop-us':24B 'engin':65B,83C 'execut':85C 'free':6A,68C 'googl':36B,72C 'handl':31B 'high':99C 'html':60B,94C 'let':7A,40B 'leverag':81C 'memori':30B 'memory-handl':29B 'need':53B 'outsid':13A,47B,88C 'packag':27B 'page':10A,61B,95C 'prior':74C 'remot':42B,79C 'run':11A,44B 'sandbox':15A,50B,90C 'secur':97C 'sever':98C 'social':64B,82C 'typic':62B 'use':4A,66C 'use-after-fre':3A 'user':26B 'via':91C 'victim':55B 'visit':57B 'webxr':2A,34B,70C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before 157.0.8103.38 is exposed when they open a malicious web page. Servers and other systems that do not run Chrome as a browser are not affected. Managed fleets should confirm every browser install has the updated build.","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: open Chrome's menu, choose Help > About Google Chrome, and let it install.","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-2026-121076","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121076","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"}