{"id":"CVE-2026-121046","kind":"vulnerability","aliases":["CVE-2026-121046"],"related":[],"title":"Chrome: web app install flaw lets a crafted page spoof the address bar","description":"Incorrect authorization in WebAppInstalls in Google Chrome prior to 157.0.8103.38 allowed a remote attacker leveraging social engineering to spoof address bar via a crafted HTML page. (Chromium security severity: Low)","summary":"A flaw in how Chrome's WebAppInstalls handles authorization lets a remote attacker spoof the address bar using a crafted HTML page. Exploitation depends on social engineering, and Chromium rates it Low severity.","severity":"low","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","endpoints","runtime"],"not_affected_if":["chrome-updated"],"how_to_check":"- Check the Chrome version via the browser's About page or `chrome://version`; versions before `157.0.8103.38` are affected.\n- Confirm whether managed devices receive Chrome updates automatically.","fix":"- Google Chrome: move to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:08+00:00","first_seen_at":"2026-11-03T21:19:09+00:00","triaged_at":"2026-11-03T21:27:21+00:00","updated_at":"2026-11-03T21:27:21+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-11-03T21:27:21Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later.","reach":"internet","title":"Chrome: web app install flaw lets a crafted page spoof the address bar","impact":"low","summary":"A flaw in how Chrome's WebAppInstalls handles authorization lets a remote attacker spoof the address bar using a crafted HTML page. Exploitation depends on social engineering, and Chromium rates it Low severity.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browsers","endpoints"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"Attacker spoofs the address bar to mislead users into trusting a fake site.","analyst_note":"","how_to_check":"- Check the Chrome version via the browser's About page or `chrome://version`; versions before `157.0.8103.38` are affected.\n- Confirm whether managed devices receive Chrome updates automatically.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later.","needs_analyst":false,"not_affected_if":["chrome-updated"],"who_is_affected":"Any device running Google Chrome before 157.0.8103.38 is exposed when a user opens a crafted HTML page. Organisations should check managed browser fleets for the version. unknown for any further detail the sources do not give.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"low"},"cost_usd":0.000666,"input_tokens":4110,"output_tokens":510,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121046':16A,19A '-2026':15A,18A '157.0.8103.38':66C 'address':12A,39B,76C 'allow':67C 'app':3A 'attack':36B,70C 'author':32B,58C 'bar':13A,40B,77C 'browser':20B 'chrome':1A,21B,28B,63C 'chromium':52B,83C 'craft':8A,43B,80C 'cve':14A,17A 'depend':47B 'endpoint':22B 'engin':50B,73C 'exploit':46B 'flaw':5A,25B 'googl':62C 'handl':31B 'html':44B,81C 'incorrect':57C 'instal':4A 'let':6A,33B 'leverag':71C 'low':55B,86C 'page':9A,45B,82C 'prior':64C 'rate':53B 'remot':35B,69C 'runtim':23B 'secur':84C 'sever':56B,85C 'social':49B,72C 'spoof':10A,37B,75C 'use':41B 'via':78C 'web':2A 'webappinstal':30B,60C","nicknames":[],"mitigations":[],"who_affected":"Any device running Google Chrome before 157.0.8103.38 is exposed when a user opens a crafted HTML page. Organisations should check managed browser fleets for the version. unknown for any further detail the sources do not give.","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":["browsers","chrome","endpoints","low","runtime"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:08+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121046","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121046","severity":null,"published_at":"2026-11-03T21:17:08+00:00","modified_at":"2026-11-03T21:17:08+00:00","first_seen_at":"2026-11-03T21:19:09+00:00","fetched_at":"2026-11-03T21:19:09+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"}