{"id":"CVE-2026-121243","kind":"vulnerability","aliases":["CVE-2026-121243"],"related":[],"title":"Google Chrome: crafted web page can leak sensitive information from Frames","description":"Information leak in Frames in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to obtain sensitive information via a crafted HTML page. (Chromium security severity: Low)","summary":"A flaw in how Chrome handles Frames lets a crafted HTML page obtain sensitive information. Chromium rates it Low severity.","severity":"low","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","mobile","runtime"],"not_affected_if":["chrome-up-to-date"],"how_to_check":"- Check the Chrome version in Chrome's About page or with `chrome --version` on the machine.\n- Compare the installed version against `157.0.8103.38`; anything older is listed as affected.","fix":"- Google Chrome: update to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:34+00:00","first_seen_at":"2026-11-03T21:19:29+00:00","triaged_at":"2026-11-03T21:21:08+00:00","updated_at":"2026-11-03T21:21:08+00:00","category":"runtime","confidence":0.8,"triage":{"at":"2026-11-03T21:21:08Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: update to `157.0.8103.38` or later.","reach":"internet","title":"Google Chrome: crafted web page can leak sensitive information from Frames","impact":"low","summary":"A flaw in how Chrome handles Frames lets a crafted HTML page obtain sensitive information. Chromium rates it Low severity.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browser","desktop","mobile"],"confidence":0.8,"fix_status":"available","needs_auth":"no","worst_case":"Sensitive information from the browsing session is exposed to the attacker's page.","analyst_note":"","how_to_check":"- Check the Chrome version in Chrome's About page or with `chrome --version` on the machine.\n- Compare the installed version against `157.0.8103.38`; anything older is listed as affected.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later: open the Chrome menu, choose Help, then About Google Chrome.","needs_analyst":false,"not_affected_if":["chrome-up-to-date"],"who_is_affected":"Anyone running Google Chrome older than 157.0.8103.38 who visits a page an attacker controls. Exploitation requires a victim to load the crafted page; no account is needed.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"low"},"cost_usd":0.000654,"input_tokens":4094,"output_tokens":490,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121243':14A,17A '-2026':13A,16A '157.0.8103.38':52C 'allow':53C 'attack':56C 'browser':18B 'chrome':2A,19B,27B,49C 'chromium':38B,66C 'craft':3A,32B,63C 'cve':12A,15A 'desktop':20B 'flaw':24B 'frame':11A,29B,46C 'googl':1A,48C 'handl':28B 'html':33B,64C 'inform':9A,37B,43C,60C 'leak':7A,44C 'let':30B 'low':41B,69C 'mobil':21B 'obtain':35B,58C 'page':5A,34B,65C 'prior':50C 'rate':39B 'remot':55C 'runtim':22B 'secur':67C 'sensit':8A,36B,59C 'sever':42B,68C 'via':61C 'web':4A","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome older than 157.0.8103.38 who visits a page an attacker controls. Exploitation requires a victim to load the crafted page; no account is needed.","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: open the Chrome menu, choose Help, then About Google Chrome.","pkeys":[],"ptokens":[],"labels":["browser","chrome","desktop","low","mobile","runtime"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:34+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121243","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121243","severity":null,"published_at":"2026-11-03T21:17:34+00:00","modified_at":"2026-11-03T21:17:34+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"}