{"id":"CVE-2026-124905","kind":"vulnerability","aliases":["CVE-2026-124905"],"related":[],"title":"Firefox: DOM Navigation sandbox escape fixed in Firefox 160","description":"Sandbox escape in the DOM: Navigation component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, and Firefox ESR 153.7.","summary":"A flaw in the DOM Navigation component of Firefox lets web content escape the browser's sandbox. A successful attack could let a malicious web page reach beyond the sandboxed content process.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","desktop","firefox","runtime"],"not_affected_if":["patched-version"],"how_to_check":"- Check the installed Firefox version in the browser's About menu or with `firefox --version`\n- Compare it against the fixed versions: `160`, `115.45`, `153.7`","fix":"- Firefox: `160`\n- Firefox ESR 115: `115.45`\n- Firefox ESR 153: `153.7`","status":"open","published_at":"2026-11-10T14:17:24+00:00","first_seen_at":"2026-11-10T14:22:17+00:00","triaged_at":"2026-11-10T14:24:46+00:00","updated_at":"2026-11-10T14:24:46+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-11-10T14:24:46Z","model":"claude-haiku-5-5","output":{"fix":"- Firefox: `160`\n- Firefox ESR 115: `115.45`\n- Firefox ESR 153: `153.7`","reach":"internet","title":"Firefox: DOM Navigation sandbox escape fixed in Firefox 160","impact":"high","summary":"A flaw in the DOM Navigation component of Firefox lets web content escape the browser's sandbox. A successful attack could let a malicious web page reach beyond the sandboxed content process.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["firefox","browser","desktop"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"malicious web page escapes browser sandbox","analyst_note":"Confirm the Mozilla advisory for CVE-2026-124905 and whether the flaw needs user interaction or a specific page.","how_to_check":"- Check the installed Firefox version in the browser's About menu or with `firefox --version`\n- Compare it against the fixed versions: `160`, `115.45`, `153.7`","plain_action":"Update Firefox to version 160, or the ESR release 115.45 or 153.7 if you use ESR, using the browser's update check.","product_name":"","needs_analyst":true,"not_affected_if":["patched-version"],"who_is_affected":"Anyone running Firefox or Firefox ESR builds older than the fixed versions. Browsers that auto-update and are already on a fixed release are not exposed. Sources do not say which page or navigation pattern triggers the flaw.","user_interaction":"yes","product_ecosystem":"","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000738,"input_tokens":4488,"output_tokens":579,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-124905':12A,15A '-2026':11A,14A '115.45':68C '153.7':72C '160':9A,65C 'attack':39B 'beyond':47B 'browser':16B,34B 'compon':26B,58C 'content':31B,50B 'could':40B 'cve':10A,13A 'desktop':17B 'dom':2A,24B,56C 'escap':5A,32B,53C 'esr':67C,71C 'firefox':1A,8A,18B,28B,64C,66C,70C 'fix':6A,62C 'flaw':21B 'let':29B,41B 'malici':43B 'navig':3A,25B,57C 'page':45B 'process':51B 'reach':46B 'runtim':19B 'sandbox':4A,36B,49B,52C 'success':38B 'vulner':60C 'web':30B,44B","nicknames":[],"mitigations":[],"who_affected":"Anyone running Firefox or Firefox ESR builds older than the fixed versions. Browsers that auto-update and are already on a fixed release are not exposed. Sources do not say which page or navigation pattern triggers the flaw.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Firefox to version 160, or the ESR release 115.45 or 153.7 if you use ESR, using the browser's update check.","pkeys":[],"ptokens":[],"labels":["browser","desktop","firefox","high","runtime"],"campaign_type":null,"search_a":"'-124905':12A,15A '-2026':11A,14A '160':9A 'cve':10A,13A 'dom':2A 'escap':5A 'firefox':1A,8A 'fix':6A 'navig':3A 'sandbox':4A","search_b":"'attack':39B 'beyond':47B 'browser':16B,34B 'compon':26B 'content':31B,50B 'could':40B 'desktop':17B 'dom':24B 'escap':32B 'firefox':18B,28B 'flaw':21B 'let':29B,41B 'malici':43B 'navig':25B 'page':45B 'process':51B 'reach':46B 'runtim':19B 'sandbox':36B,49B 'success':38B 'web':30B,44B","search_c":"'115.45':68C '153.7':72C '160':65C 'compon':58C 'dom':56C 'escap':53C 'esr':67C,71C 'firefox':64C,66C,70C 'fix':62C 'navig':57C 'sandbox':52C 'vulner':60C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T14:17:24+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-124905","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124905","severity":null,"published_at":"2026-11-10T14:17:24+00:00","modified_at":"2026-11-10T14:17:24+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"}