{"id":"CVE-2026-124892","kind":"vulnerability","aliases":["CVE-2026-124892"],"related":[],"title":"Firefox: use-after-free in JavaScript garbage collector 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 Firefox's JavaScript garbage collector can corrupt memory while a page runs 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":[{"name":"Firefox","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["browser","firefox","runtime"],"not_affected_if":[],"how_to_check":"- Check the installed Firefox version in the About Firefox menu and compare it with `160` or `153.7`","fix":"- Firefox `160` and 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":"2026-11-10T14:25:58+00:00","updated_at":"2026-11-10T14:25:58+00:00","category":"runtime","confidence":0.5,"triage":{"at":"2026-11-10T14:25:58Z","model":"claude-haiku-5-5","output":{"fix":"- Firefox `160` and Firefox ESR `153.7`","reach":"internet","title":"Firefox: use-after-free in JavaScript garbage collector fixed in 160","impact":"high","summary":"A use-after-free bug in Firefox's JavaScript garbage collector can corrupt memory while a page runs 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":"Confirm the impact and exploitation details from the NVD entry or Mozilla's advisory, which the sources do not quote.","how_to_check":"- Check the installed Firefox version in the About Firefox menu and compare it with `160` or `153.7`\n- unknown","plain_action":"Update Firefox to version 160 or ESR 153.7 or later.","product_name":"Firefox","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"unknown","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000672,"input_tokens":4474,"output_tokens":450,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-124892':15A,18A '-2026':14A,17A '153.7':73C '160':12A,69C 'achiev':52B 'attack':50B 'beyond':53B 'browser':20B 'bug':28B 'collector':9A,34B 'compon':62C 'corrupt':36B 'cve':13A,16A 'esr':72C 'firefox':1A,19A,21B,30B,68C,71C 'fix':10A,66C 'free':5A,27B,57C 'garbag':8A,33B 'gc':61C 'javascript':7A,32B,60C 'memori':37B 'page':40B 'run':41B 'runtim':22B 'say':47B 'script':42B 'sourc':44B 'use':3A,25B,55C 'use-after-fre':2A,24B,54C 'vulner':64C","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 ESR 153.7 or later.","pkeys":["firefox"],"ptokens":["firefox"],"labels":["browser","firefox","runtime","unknown","vendor"],"campaign_type":null,"search_a":"'-124892':15A,18A '-2026':14A,17A '160':12A 'collector':9A 'cve':13A,16A 'firefox':1A,19A 'fix':10A 'free':5A 'garbag':8A 'javascript':7A 'use':3A 'use-after-fre':2A","search_b":"'achiev':52B 'attack':50B 'beyond':53B 'browser':20B 'bug':28B 'collector':34B 'corrupt':36B 'firefox':21B,30B 'free':27B 'garbag':33B 'javascript':32B 'memori':37B 'page':40B 'run':41B 'runtim':22B 'say':47B 'script':42B 'sourc':44B 'use':25B 'use-after-fre':24B","search_c":"'153.7':73C '160':69C 'compon':62C 'esr':72C 'firefox':68C,71C 'fix':66C 'free':57C 'gc':61C 'javascript':60C 'use':55C 'use-after-fre':54C 'vulner':64C","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-2026-124892","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124892","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"}