{"id":"CVE-2026-124938","kind":"vulnerability","aliases":["CVE-2026-124938"],"related":[],"title":"Firefox: Add-ons Manager mitigation bypass fixed in Firefox 160","description":"Mitigation bypass in the Add-ons Manager component. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.","summary":"A mitigation bypass in the Firefox Add-ons Manager component was fixed in Firefox 160 and Firefox ESR 153.7. The sources do not say what an attacker gains beyond bypassing a security mitigation.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","firefox","runtime"],"not_affected_if":["already-updated-firefox"],"how_to_check":"- Check the installed Firefox version in the About Firefox dialog or with `firefox --version`\n- Compare against the fixed versions `160` (Firefox) and `153.7` (Firefox ESR)","fix":"- Firefox: `160`\n- Firefox ESR: `153.7`","status":"open","published_at":"2026-11-10T14:17:28+00:00","first_seen_at":"2026-11-10T14:22:19+00:00","triaged_at":"2026-11-10T14:24:08+00:00","updated_at":"2026-11-10T14:24:08+00:00","category":"runtime","confidence":0.5,"triage":{"at":"2026-11-10T14:24:08Z","model":"claude-haiku-5-5","output":{"fix":"- Firefox: `160`\n- Firefox ESR: `153.7`","reach":"unknown","title":"Firefox: Add-ons Manager mitigation bypass fixed in Firefox 160","impact":"medium","summary":"A mitigation bypass in the Firefox Add-ons Manager component was fixed in Firefox 160 and Firefox ESR 153.7. The sources do not say what an attacker gains beyond bypassing a security mitigation.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["firefox","browsers"],"confidence":0.5,"fix_status":"available","needs_auth":"unknown","worst_case":"unknown; sources only describe a mitigation bypass","analyst_note":"Check the Mozilla security advisory for CVE-2026-124938 to learn the attack trigger, user interaction, and impact.","how_to_check":"- Check the installed Firefox version in the About Firefox dialog or with `firefox --version`\n- Compare against the fixed versions `160` (Firefox) and `153.7` (Firefox ESR)","plain_action":"Update Firefox to version 160 or Firefox ESR 153.7 through its built-in update check.","product_name":"","needs_analyst":true,"not_affected_if":["already-updated-firefox"],"who_is_affected":"Anyone running Firefox below version 160 or Firefox ESR below 153.7 is affected. Sources do not say whether specific configurations or add-ons are required to trigger it.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000732,"input_tokens":4478,"output_tokens":568,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-124938':14A,17A '-2026':13A,16A '153.7':40B,74C '160':11A,36B,70C 'add':3A,28B,60C 'add-on':2A,27B,59C 'attack':48B 'beyond':50B 'browser':18B 'bypass':7A,23B,51B,56C 'compon':31B,63C 'cve':12A,15A 'esr':39B,73C 'firefox':1A,10A,19B,26B,35B,38B,69C,72C 'fix':8A,33B,67C 'gain':49B 'manag':5A,30B,62C 'mitig':6A,22B,54B,55C 'on':4A,29B,61C 'runtim':20B 'say':45B 'secur':53B 'sourc':42B 'vulner':65C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Firefox below version 160 or Firefox ESR below 153.7 is affected. Sources do not say whether specific configurations or add-ons are required to trigger it.","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 built-in update check.","pkeys":[],"ptokens":[],"labels":["browsers","firefox","runtime","unknown"],"campaign_type":null,"search_a":"'-124938':14A,17A '-2026':13A,16A '160':11A 'add':3A 'add-on':2A 'bypass':7A 'cve':12A,15A 'firefox':1A,10A 'fix':8A 'manag':5A 'mitig':6A 'on':4A","search_b":"'153.7':40B '160':36B 'add':28B 'add-on':27B 'attack':48B 'beyond':50B 'browser':18B 'bypass':23B,51B 'compon':31B 'esr':39B 'firefox':19B,26B,35B,38B 'fix':33B 'gain':49B 'manag':30B 'mitig':22B,54B 'on':29B 'runtim':20B 'say':45B 'secur':53B 'sourc':42B","search_c":"'153.7':74C '160':70C 'add':60C 'add-on':59C 'bypass':56C 'compon':63C 'esr':73C 'firefox':69C,72C 'fix':67C 'manag':62C 'mitig':55C 'on':61C 'vulner':65C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T14:17:28+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-124938","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124938","severity":null,"published_at":"2026-11-10T14:17:28+00:00","modified_at":"2026-11-10T14:17:28+00:00","first_seen_at":"2026-11-10T14:22:19+00:00","fetched_at":"2026-11-10T14:22:19+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"}