{"id":"CVE-2026-117960","kind":"vulnerability","aliases":["CVE-2026-117960"],"related":[],"title":"Firefox: DOM spoofing flaw in Core and HTML component, fixed","description":"Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 159 and Firefox ESR 153.6.","summary":"A spoofing flaw in the DOM Core and HTML component of Firefox lets a page present misleading content to the user. The sources do not say what exact content can be spoofed or what an attacker gains beyond that.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","desktop","firefox","other"],"not_affected_if":["already-updated-to-159-or-153.6"],"how_to_check":"- Check the installed Firefox version in the browser's About menu or with `firefox --version`; releases before `159` and ESR before `153.6` are the ones named as fixed.\n- unknown for other checks, the sources do not say.","fix":"- Update Firefox to `159` or later, or Firefox ESR to `153.6` or later.","status":"open","published_at":"2026-10-27T14:16:52+00:00","first_seen_at":"2026-10-27T14:32:24+00:00","triaged_at":"2026-10-27T14:35:29+00:00","updated_at":"2026-10-27T14:35:29+00:00","category":"other","confidence":0.4,"triage":{"at":"2026-10-27T14:35:29Z","model":"claude-haiku-5-5","output":{"fix":"- Update Firefox to `159` or later, or Firefox ESR to `153.6` or later.","reach":"unknown","title":"Firefox: DOM spoofing flaw in Core and HTML component, fixed","impact":"low","summary":"A spoofing flaw in the DOM Core and HTML component of Firefox lets a page present misleading content to the user. The sources do not say what exact content can be spoofed or what an attacker gains beyond that.","category":"other","nicknames":[],"who_cares":["firefox","browser","desktop"],"confidence":0.4,"needs_auth":"unknown","worst_case":"Users may be shown spoofed page content; details unknown.","analyst_note":"Find the Mozilla security advisory for the Firefox 159 and ESR 153.6 fix to learn the exact spoofing scope and any user interaction required.","how_to_check":"- Check the installed Firefox version in the browser's About menu or with `firefox --version`; releases before `159` and ESR before `153.6` are the ones named as fixed.\n- unknown for other checks, the sources do not say.","needs_analyst":true,"not_affected_if":["already-updated-to-159-or-153.6"],"who_is_affected":"Teams whose staff or systems run Firefox or Firefox ESR on desktops or servers that browse web content. The sources do not name a specific configuration or data path, so unknown whether any setup is excluded.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000586,"input_tokens":3244,"output_tokens":523,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-117960':13A,16A '-2026':12A,15A '153.6':76C '159':72C 'attack':55B 'beyond':57B 'browser':17B 'compon':9A,29B,65C 'content':37B,48B 'core':6A,26B,63C 'cve':11A,14A 'desktop':18B 'dom':2A,25B,62C 'esr':75C 'exact':47B 'firefox':1A,19B,31B,71C,74C 'fix':10A,69C 'flaw':4A,22B 'gain':56B 'html':8A,28B,64C 'issu':59C 'let':32B 'mislead':36B 'page':34B 'present':35B 'say':45B 'sourc':42B 'spoof':3A,21B,51B,58C 'user':40B 'vulner':67C","nicknames":[],"mitigations":[],"who_affected":"Teams whose staff or systems run Firefox or Firefox ESR on desktops or servers that browse web content. The sources do not name a specific configuration or data path, so unknown whether any setup is excluded.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T14:16:52+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-117960","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-117960","severity":null,"published_at":"2026-10-27T14:16:52+00:00","modified_at":"2026-10-27T14:16:52+00:00","first_seen_at":"2026-10-27T14:32:24+00:00","fetched_at":"2026-10-27T14:32:24+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"}