{"id":"CVE-2026-121252","kind":"vulnerability","aliases":["CVE-2026-121252"],"related":[],"title":"Google Chrome: crafted HTML page bypasses web origin policy","description":"Incorrect authorization in Core 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: Low)","summary":"Chrome's Core component had an authorization flaw before 157.0.8103.38 that let a remote attacker bypass web origin policy using a crafted HTML page. Chromium rates it Low severity.","severity":"low","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","package"],"not_affected_if":["chrome-updated"],"how_to_check":"- Check the installed Chrome version in Chrome's About page or with `google-chrome --version` on Linux\n- Compare the result against `157.0.8103.38`","fix":"- Google Chrome: move to `157.0.8103.38` or later","status":"open","published_at":"2026-11-03T21:17:35+00:00","first_seen_at":"2026-11-03T21:19:29+00:00","triaged_at":"2026-11-03T21:20:56+00:00","updated_at":"2026-11-03T21:20:56+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-11-03T21:20:56Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later","reach":"internet","title":"Google Chrome: crafted HTML page bypasses web origin policy","impact":"medium","summary":"Chrome's Core component had an authorization flaw before 157.0.8103.38 that let a remote attacker bypass web origin policy using a crafted HTML page. Chromium rates it Low severity.","audience":"everyone","category":"package","nicknames":[],"who_cares":["chrome","desktop","browser"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"attacker bypasses origin policy to read cross-site data","analyst_note":"","how_to_check":"- Check the installed Chrome version in Chrome's About page or with `google-chrome --version` on Linux\n- Compare the result against `157.0.8103.38`","plain_action":"Update Google Chrome to version 157.0.8103.38 or later through Chrome's update settings.","needs_analyst":false,"not_affected_if":["chrome-updated"],"who_is_affected":"Anyone running Google Chrome before 157.0.8103.38 who visits untrusted web pages. Exploitation requires a victim to load the attacker's HTML page. Managed or updated installs are not affected once patched.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"low"},"cost_usd":0.00065,"input_tokens":4097,"output_tokens":481,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121252':12A,15A '-2026':11A,14A '157.0.8103.38':29B,58C 'allow':59C 'attack':34B,62C 'author':26B,50C 'browser':16B 'bypass':6A,35B,64C 'chrome':2A,17B,20B,55C 'chromium':44B,73C 'compon':23B 'core':22B,52C 'craft':3A,41B,70C 'cve':10A,13A 'desktop':18B 'flaw':27B 'googl':1A,54C 'html':4A,42B,71C 'incorrect':49C 'let':31B 'low':47B,76C 'origin':8A,37B,66C 'packag':19B 'page':5A,43B,72C 'polici':9A,38B,67C 'prior':56C 'rate':45B 'remot':33B,61C 'secur':74C 'sever':48B,75C 'use':39B 'via':68C 'web':7A,36B,65C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before 157.0.8103.38 who visits untrusted web pages. Exploitation requires a victim to load the attacker's HTML page. Managed or updated installs are not affected once patched.","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 through Chrome's update settings.","pkeys":[],"ptokens":[],"labels":["browser","chrome","desktop","low","package"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:35+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121252","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121252","severity":null,"published_at":"2026-11-03T21:17:35+00:00","modified_at":"2026-11-03T21:17:36+00:00","first_seen_at":"2026-11-03T21:19:29+00:00","fetched_at":"2026-11-03T21:19:29+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"}