{"id":"CVE-2026-124897","kind":"vulnerability","aliases":["CVE-2026-124897"],"related":[],"title":"Firefox: JavaScript garbage collector use-after-free flaw fixed in 160","description":"Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.","summary":"A use-after-free bug in the JavaScript garbage collector of Firefox can corrupt memory when the browser runs crafted script. The sources do not say what an attacker can achieve beyond that.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","firefox","runtime"],"not_affected_if":[],"how_to_check":"- Check the Firefox version in Help > About Firefox; the sources name Firefox 160 and Firefox ESR 153.7 as the fixed releases.","fix":"- Firefox: `160`\n- Firefox ESR: `153.7`","status":"open","published_at":"2026-11-10T14:17:23+00:00","first_seen_at":"2026-11-10T14:22:16+00:00","triaged_at":"2026-11-10T14:24:56+00:00","updated_at":"2026-11-10T14:24:56+00:00","category":"runtime","confidence":0.5,"triage":{"at":"2026-11-10T14:24:56Z","model":"claude-haiku-5-5","output":{"fix":"- Firefox: `160`\n- Firefox ESR: `153.7`","reach":"internet","title":"Firefox: JavaScript garbage collector use-after-free flaw fixed in 160","impact":"high","summary":"A use-after-free bug in the JavaScript garbage collector of Firefox can corrupt memory when the browser runs crafted script. The sources do not say what an attacker can achieve beyond that.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["firefox","browser"],"confidence":0.5,"fix_status":"available","needs_auth":"unknown","worst_case":"unknown; memory corruption in the browser's JavaScript engine","analyst_note":"Check the NVD entry and Mozilla's advisory for exploit conditions, severity, and whether the flaw is exploited in the wild.","how_to_check":"- Check the Firefox version in Help > About Firefox; the sources name Firefox 160 and Firefox ESR 153.7 as the fixed releases.\n- unknown for any other check; the sources do not say.","plain_action":"Update Firefox to version 160 or Firefox ESR 153.7 or newer.","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000694,"input_tokens":4474,"output_tokens":493,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-124897':15A,18A '-2026':14A,17A '153.7':74C '160':12A,70C 'achiev':53B 'attack':51B 'beyond':54B 'browser':19B,40B 'bug':27B 'collector':4A,32B 'compon':63C 'corrupt':36B 'craft':42B 'cve':13A,16A 'esr':73C 'firefox':1A,20B,34B,69C,72C 'fix':10A,67C 'flaw':9A 'free':8A,26B,58C 'garbag':3A,31B 'gc':62C 'javascript':2A,30B,61C 'memori':37B 'run':41B 'runtim':21B 'say':48B 'script':43B 'sourc':45B 'use':6A,24B,56C 'use-after-fre':5A,23B,55C 'vulner':65C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Firefox to version 160 or Firefox ESR 153.7 or newer.","pkeys":[],"ptokens":[],"labels":["browser","firefox","runtime","unknown"],"campaign_type":null,"search_a":"'-124897':15A,18A '-2026':14A,17A '160':12A 'collector':4A 'cve':13A,16A 'firefox':1A 'fix':10A 'flaw':9A 'free':8A 'garbag':3A 'javascript':2A 'use':6A 'use-after-fre':5A","search_b":"'achiev':53B 'attack':51B 'beyond':54B 'browser':19B,40B 'bug':27B 'collector':32B 'corrupt':36B 'craft':42B 'firefox':20B,34B 'free':26B 'garbag':31B 'javascript':30B 'memori':37B 'run':41B 'runtim':21B 'say':48B 'script':43B 'sourc':45B 'use':24B 'use-after-fre':23B","search_c":"'153.7':74C '160':70C 'compon':63C 'esr':73C 'firefox':69C,72C 'fix':67C 'free':58C 'gc':62C 'javascript':61C 'use':56C 'use-after-fre':55C 'vulner':65C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T14:17:23+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-124897","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124897","severity":null,"published_at":"2026-11-10T14:17:23+00:00","modified_at":"2026-11-10T14:17:23+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"}