{"id":"CVE-2026-124891","kind":"vulnerability","aliases":["CVE-2026-124891"],"related":[],"title":"Firefox: DOM Selection boundary bug fixed in Firefox 160","description":"Incorrect boundary conditions in the DOM: Selection component. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.","summary":"Firefox has an incorrect boundary-condition flaw in its DOM Selection component. The sources do not say what an attacker can gain from it.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","firefox","other"],"not_affected_if":["firefox-160-or-later"],"how_to_check":"- Check the installed Firefox version (Help > About Firefox) and compare it with `160` or `153.7` for ESR.","fix":"- Firefox: `160`\n- Firefox ESR: `153.7`","status":"open","published_at":"2026-11-10T14:17:22+00:00","first_seen_at":"2026-11-10T14:22:16+00:00","triaged_at":"2026-11-10T14:25:59+00:00","updated_at":"2026-11-10T14:25:59+00:00","category":"other","confidence":0.4,"triage":{"at":"2026-11-10T14:25:59Z","model":"claude-haiku-5-5","output":{"fix":"- Firefox: `160`\n- Firefox ESR: `153.7`","reach":"unknown","title":"Firefox: DOM Selection boundary bug fixed in Firefox 160","impact":"medium","summary":"Firefox has an incorrect boundary-condition flaw in its DOM Selection component. The sources do not say what an attacker can gain from it.","audience":"everyone","category":"other","nicknames":[],"who_cares":["firefox","browsers"],"confidence":0.4,"fix_status":"available","needs_auth":"unknown","worst_case":"unknown","analyst_note":"Find the Mozilla advisory and bug entry for the Selection boundary flaw to confirm impact, trigger and reach.","how_to_check":"- Check the installed Firefox version (Help > About Firefox) and compare it with `160` or `153.7` for ESR.\n- unknown","plain_action":"Update Firefox to version 160 or ESR 153.7 through Help > About Firefox.","product_name":"","needs_analyst":true,"not_affected_if":["firefox-160-or-later"],"who_is_affected":"Anyone running Firefox older than version 160 or Firefox ESR older than 153.7. The sources do not describe the trigger or the impact further.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000691,"input_tokens":4482,"output_tokens":485,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-124891':12A,15A '-2026':11A,14A '153.7':59C '160':9A,55C 'attack':38B 'boundari':4A,23B,42C 'boundary-condit':22B 'browser':16B 'bug':5A 'compon':30B,48C 'condit':24B,43C 'cve':10A,13A 'dom':2A,28B,46C 'esr':58C 'firefox':1A,8A,17B,18B,54C,57C 'fix':6A,52C 'flaw':25B 'gain':40B 'incorrect':21B,41C 'say':35B 'select':3A,29B,47C 'sourc':32B 'vulner':50C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Firefox older than version 160 or Firefox ESR older than 153.7. The sources do not describe the trigger or the impact further.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Firefox to version 160 or ESR 153.7 through Help > About Firefox.","pkeys":[],"ptokens":[],"labels":["browsers","firefox","other","unknown"],"campaign_type":null,"search_a":"'-124891':12A,15A '-2026':11A,14A '160':9A 'boundari':4A 'bug':5A 'cve':10A,13A 'dom':2A 'firefox':1A,8A 'fix':6A 'select':3A","search_b":"'attack':38B 'boundari':23B 'boundary-condit':22B 'browser':16B 'compon':30B 'condit':24B 'dom':28B 'firefox':17B,18B 'flaw':25B 'gain':40B 'incorrect':21B 'say':35B 'select':29B 'sourc':32B","search_c":"'153.7':59C '160':55C 'boundari':42C 'compon':48C 'condit':43C 'dom':46C 'esr':58C 'firefox':54C,57C 'fix':52C 'incorrect':41C 'select':47C 'vulner':50C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T14:17:22+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-124891","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124891","severity":null,"published_at":"2026-11-10T14:17:22+00:00","modified_at":"2026-11-10T14:17:22+00:00","first_seen_at":"2026-11-10T14:22:16+00:00","fetched_at":"2026-11-10T14:22:16+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"}