{"id":"CVE-2026-121087","kind":"vulnerability","aliases":["CVE-2026-121087"],"related":[],"title":"Chrome for Android: crafted page bypasses web origin policy, fixed in 157","description":"Improper input validation in Mobile in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: High)","summary":"Improper input validation in the mobile version of Google Chrome lets a remote attacker bypass the web origin policy using a crafted HTML page. Chromium rates it High severity, and the sources give no further detail on what data is exposed.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["android","chrome","ios","mobile","package"],"not_affected_if":["desktop-only-use","updated-chrome"],"how_to_check":"- Open Chrome on the phone and check the version under Settings > About Chrome.\n- Fleet tools can report the Chrome version per device, if the team manages devices.","fix":"- Chrome for mobile prior to `157.0.8103.38` is affected; move to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:14+00:00","first_seen_at":"2026-11-03T21:19:12+00:00","triaged_at":"2026-11-03T21:25:33+00:00","updated_at":"2026-11-03T21:25:33+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-11-03T21:25:33Z","model":"claude-haiku-5-5","output":{"fix":"- Chrome for mobile prior to `157.0.8103.38` is affected; move to `157.0.8103.38` or later.","reach":"internet","title":"Chrome for Android: crafted page bypasses web origin policy, fixed in 157","impact":"medium","summary":"Improper input validation in the mobile version of Google Chrome lets a remote attacker bypass the web origin policy using a crafted HTML page. Chromium rates it High severity, and the sources give no further detail on what data is exposed.","audience":"everyone","category":"package","nicknames":[],"who_cares":["chrome","android","ios","mobile"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"Attacker reads or acts on another site's data in the browser.","analyst_note":"","how_to_check":"- Open Chrome on the phone and check the version under Settings > About Chrome.\n- Fleet tools can report the Chrome version per device, if the team manages devices.","plain_action":"Update Google Chrome on your phone to version 157.0.8103.38 or later through the app store.","needs_analyst":false,"not_affected_if":["desktop-only-use","updated-chrome"],"who_is_affected":"Anyone using Chrome on a mobile device before version 157.0.8103.38 who visits a page an attacker controls. Desktop Chrome and other browsers are not named in the sources. Teams that manage mobile devices should confirm Chrome versions across them.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000679,"input_tokens":4096,"output_tokens":538,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121087':15A,18A '-2026':14A,17A '157':12A '157.0.8103.38':75C 'allow':76C 'android':3A,19B 'attack':37B,79C 'bypass':6A,38B,81C 'chrome':1A,20B,33B,72C 'chromium':48B,90C 'craft':4A,45B,87C 'cve':13A,16A 'data':62B 'detail':59B 'expos':64B 'fix':10A 'give':56B 'googl':32B,71C 'high':51B,93C 'html':46B,88C 'improp':24B,65C 'input':25B,66C 'io':21B 'let':34B 'mobil':22B,29B,69C 'origin':8A,41B,83C 'packag':23B 'page':5A,47B,89C 'polici':9A,42B,84C 'prior':73C 'rate':49B 'remot':36B,78C 'secur':91C 'sever':52B,92C 'sourc':55B 'use':43B 'valid':26B,67C 'version':30B 'via':85C 'web':7A,40B,82C","nicknames":[],"mitigations":[],"who_affected":"Anyone using Chrome on a mobile device before version 157.0.8103.38 who visits a page an attacker controls. Desktop Chrome and other browsers are not named in the sources. Teams that manage mobile devices should confirm Chrome versions across them.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Google Chrome on your phone to version 157.0.8103.38 or later through the app store.","pkeys":[],"ptokens":[],"labels":["android","chrome","high","ios","mobile","package"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:14+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121087","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121087","severity":null,"published_at":"2026-11-03T21:17:14+00:00","modified_at":"2026-11-03T21:17:14+00:00","first_seen_at":"2026-11-03T21:19:12+00:00","fetched_at":"2026-11-03T21:19:12+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"}