{"id":"CVE-2026-121141","kind":"vulnerability","aliases":["CVE-2026-121141"],"related":[],"title":"Chrome: crafted HTML page bypasses web origin policy via editing","description":"Improper input validation in Editing in Google Chrome prior to 157.0.8103.38 allowed a remote attacker leveraging social engineering to bypass web origin policy via a crafted HTML page. (Chromium security severity: Low)","summary":"Improper input validation in the Editing component of Google Chrome before 157.0.8103.38 lets a remote attacker bypass web origin policy using a crafted HTML page. The attacker must socially engineer a user into visiting the page, and Chromium rates the issue Low severity.","severity":"low","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","runtime"],"not_affected_if":["chrome-up-to-date"],"how_to_check":"- Check the installed Chrome version in the browser's About page or with `google-chrome --version`; versions below `157.0.8103.38` are affected.","fix":"- Google Chrome: move to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:22+00:00","first_seen_at":"2026-11-03T21:19:22+00:00","triaged_at":"2026-11-03T21:24:39+00:00","updated_at":"2026-11-03T21:24:39+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-11-03T21:24:39Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later.","reach":"internet","title":"Chrome: crafted HTML page bypasses web origin policy via editing","impact":"medium","summary":"Improper input validation in the Editing component of Google Chrome before 157.0.8103.38 lets a remote attacker bypass web origin policy using a crafted HTML page. The attacker must socially engineer a user into visiting the page, and Chromium rates the issue Low severity.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browser","desktop"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"Web origin policy bypassed, letting a page read or act across sites","analyst_note":"","how_to_check":"- Check the installed Chrome version in the browser's About page or with `google-chrome --version`; versions below `157.0.8103.38` are affected.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later from the browser's About page.","needs_analyst":false,"not_affected_if":["chrome-up-to-date"],"who_is_affected":"Anyone running Google Chrome before 157.0.8103.38 is exposed when they open a crafted HTML page. Managed fleets should check the Chrome version on each machine. Users on current Chrome builds can skip it.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"low"},"cost_usd":0.000665,"input_tokens":4102,"output_tokens":509,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121141':13A,16A '-2026':12A,15A '157.0.8103.38':32B,74C 'allow':75C 'attack':36B,47B,78C 'browser':17B 'bypass':5A,37B,83C 'chrome':1A,18B,30B,71C 'chromium':58B,92C 'compon':27B 'craft':2A,43B,89C 'cve':11A,14A 'desktop':19B 'edit':10A,26B,68C 'engin':50B,81C 'googl':29B,70C 'html':3A,44B,90C 'improp':21B,64C 'input':22B,65C 'issu':61B 'let':33B 'leverag':79C 'low':62B,95C 'must':48B 'origin':7A,39B,85C 'page':4A,45B,56B,91C 'polici':8A,40B,86C 'prior':72C 'rate':59B 'remot':35B,77C 'runtim':20B 'secur':93C 'sever':63B,94C 'social':49B,80C 'use':41B 'user':52B 'valid':23B,66C 'via':9A,87C 'visit':54B 'web':6A,38B,84C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before 157.0.8103.38 is exposed when they open a crafted HTML page. Managed fleets should check the Chrome version on each machine. Users on current Chrome builds can skip it.","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 from the browser's About page.","pkeys":[],"ptokens":[],"labels":["browser","chrome","desktop","low","runtime"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:22+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121141","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121141","severity":null,"published_at":"2026-11-03T21:17:22+00:00","modified_at":"2026-11-03T21:17:22+00:00","first_seen_at":"2026-11-03T21:19:22+00:00","fetched_at":"2026-11-03T21:19:22+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"}