{"id":"CVE-2026-124912","kind":"vulnerability","aliases":["CVE-2026-124912"],"related":[],"title":"Firefox: DOM security component flaw lets attackers spoof page content","description":"Spoofing issue in the DOM: Security component. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.","summary":"A spoofing flaw in the DOM Security component of Firefox lets a malicious page mislead users about what they are looking at. The sources do not state the exact impact beyond spoofing.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Firefox","fixed":[],"affected":"","ecosystem":"runtime"}],"ecosystems":["runtime"],"tags":["browser","desktop","firefox","runtime"],"not_affected_if":["up-to-date-firefox"],"how_to_check":"- Check the Firefox version with Help > About Firefox, or `firefox --version` on the command line.\n- Compare against the fixed versions: Firefox 160 and Firefox ESR 153.7.","fix":"- Firefox: `160`\n- Firefox ESR: `153.7`","status":"open","published_at":"2026-11-10T14:17:25+00:00","first_seen_at":"2026-11-10T14:22:17+00:00","triaged_at":"2026-11-10T14:24:37+00:00","updated_at":"2026-11-10T14:24:37+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-11-10T14:24:37Z","model":"claude-haiku-5-5","output":{"fix":"- Firefox: `160`\n- Firefox ESR: `153.7`","reach":"internet","title":"Firefox: DOM security component flaw lets attackers spoof page content","impact":"low","summary":"A spoofing flaw in the DOM Security component of Firefox lets a malicious page mislead users about what they are looking at. The sources do not state the exact impact beyond spoofing.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["firefox","browser","desktop"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"A malicious page spoofs trusted content to deceive the user.","analyst_note":"Confirm the exact attack scope and impact from the Mozilla security advisory for this CVE; the NVD entry gives only a one-line description.","how_to_check":"- Check the Firefox version with Help > About Firefox, or `firefox --version` on the command line.\n- Compare against the fixed versions: Firefox 160 and Firefox ESR 153.7.","plain_action":"Update Firefox to version 160 or Firefox ESR 153.7 through its normal update process.","product_name":"Firefox","needs_analyst":true,"not_affected_if":["up-to-date-firefox"],"who_is_affected":"Anyone running Firefox older than version 160 or Firefox ESR older than 153.7. The sources do not describe a configuration that is required for exposure, so default installs appear to be in scope.","user_interaction":"yes","product_ecosystem":"runtime","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000727,"input_tokens":4472,"output_tokens":559,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-124912':13A,16A '-2026':12A,15A '153.7':71C '160':67C 'attack':7A 'beyond':52B 'browser':18B 'compon':4A,29B,60C 'content':10A 'cve':11A,14A 'desktop':19B 'dom':2A,27B,58C 'esr':70C 'exact':50B 'firefox':1A,17A,20B,31B,66C,69C 'fix':64C 'flaw':5A,24B 'impact':51B 'issu':55C 'let':6A,32B 'look':42B 'malici':34B 'mislead':36B 'page':9A,35B 'runtim':21B 'secur':3A,28B,59C 'sourc':45B 'spoof':8A,23B,53B,54C 'state':48B 'user':37B 'vulner':62C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Firefox older than version 160 or Firefox ESR older than 153.7. The sources do not describe a configuration that is required for exposure, so default installs appear to be in scope.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Firefox to version 160 or Firefox ESR 153.7 through its normal update process.","pkeys":["firefox"],"ptokens":["firefox"],"labels":["browser","desktop","firefox","runtime","unknown"],"campaign_type":null,"search_a":"'-124912':13A,16A '-2026':12A,15A 'attack':7A 'compon':4A 'content':10A 'cve':11A,14A 'dom':2A 'firefox':1A,17A 'flaw':5A 'let':6A 'page':9A 'secur':3A 'spoof':8A","search_b":"'beyond':52B 'browser':18B 'compon':29B 'desktop':19B 'dom':27B 'exact':50B 'firefox':20B,31B 'flaw':24B 'impact':51B 'let':32B 'look':42B 'malici':34B 'mislead':36B 'page':35B 'runtim':21B 'secur':28B 'sourc':45B 'spoof':23B,53B 'state':48B 'user':37B","search_c":"'153.7':71C '160':67C 'compon':60C 'dom':58C 'esr':70C 'firefox':66C,69C 'fix':64C 'issu':55C 'secur':59C 'spoof':54C 'vulner':62C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T14:17:25+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-124912","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124912","severity":null,"published_at":"2026-11-10T14:17:25+00:00","modified_at":"2026-11-10T14:17:25+00:00","first_seen_at":"2026-11-10T14:22:17+00:00","fetched_at":"2026-11-10T14:22:17+00:00","note":null}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}