{"id":"CVE-2026-124923","kind":"vulnerability","aliases":["CVE-2026-124923"],"related":[],"title":"Firefox: sandbox escape in the Agent component, fixed in 160","description":"Sandbox escape in the Agent component. This vulnerability was fixed in Firefox 160.","summary":"The sources describe a sandbox escape in an 'Agent component' that was fixed in Firefox 160. The sources do not say what an attacker gains beyond escaping the sandbox.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","firefox","other"],"not_affected_if":["firefox-160-or-later"],"how_to_check":"- Check the installed Firefox version (Help > About Firefox, or `firefox --version`) against `160`","fix":"- Firefox: `160`","status":"open","published_at":"2026-11-10T14:17:26+00:00","first_seen_at":"2026-11-10T14:22:18+00:00","triaged_at":"2026-11-10T14:24:25+00:00","updated_at":"2026-11-10T14:24:25+00:00","category":"other","confidence":0.35,"triage":{"at":"2026-11-10T14:24:25Z","model":"claude-haiku-5-5","output":{"fix":"- Firefox: `160`","reach":"unknown","title":"Firefox: sandbox escape in the Agent component, fixed in 160","impact":"high","summary":"The sources describe a sandbox escape in an 'Agent component' that was fixed in Firefox 160. The sources do not say what an attacker gains beyond escaping the sandbox.","audience":"everyone","category":"other","nicknames":[],"who_cares":["firefox","browser"],"confidence":0.35,"fix_status":"available","needs_auth":"unknown","worst_case":"unknown; the sources say only that the sandbox can be escaped","analyst_note":"Confirm via the NVD entry and Mozilla's Firefox 160 security advisories what the Agent component is, what an escape grants, and the trigger conditions.","how_to_check":"- Check the installed Firefox version (Help > About Firefox, or `firefox --version`) against `160`\n- unknown beyond that: the sources do not say which Firefox builds or configurations are affected","plain_action":"Update Firefox to version 160 or later: Help > About Firefox.","product_name":"","needs_analyst":true,"not_affected_if":["firefox-160-or-later"],"who_is_affected":"unknown. The sources name only Firefox and say the flaw was fixed in version 160; they do not describe the Agent component's role or its exposure. Firefox users on versions before 160 are the group the fix addresses.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000707,"input_tokens":4453,"output_tokens":524,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-124923':13A,16A '-2026':12A,15A '160':10A,34B,60C 'agent':6A,27B,52C 'attack':42B 'beyond':44B 'browser':17B 'compon':7A,28B,53C 'cve':11A,14A 'describ':21B 'escap':3A,24B,45B,49C 'firefox':1A,18B,33B,59C 'fix':8A,31B,57C 'gain':43B 'sandbox':2A,23B,47B,48C 'say':39B 'sourc':20B,36B 'vulner':55C","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 later: Help > About Firefox.","pkeys":[],"ptokens":[],"labels":["browser","firefox","other","unknown"],"campaign_type":null,"search_a":"'-124923':13A,16A '-2026':12A,15A '160':10A 'agent':6A 'compon':7A 'cve':11A,14A 'escap':3A 'firefox':1A 'fix':8A 'sandbox':2A","search_b":"'160':34B 'agent':27B 'attack':42B 'beyond':44B 'browser':17B 'compon':28B 'describ':21B 'escap':24B,45B 'firefox':18B,33B 'fix':31B 'gain':43B 'sandbox':23B,47B 'say':39B 'sourc':20B,36B","search_c":"'160':60C 'agent':52C 'compon':53C 'escap':49C 'firefox':59C 'fix':57C 'sandbox':48C 'vulner':55C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T14:17:26+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-124923","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124923","severity":null,"published_at":"2026-11-10T14:17:26+00:00","modified_at":"2026-11-10T14:17:26+00:00","first_seen_at":"2026-11-10T14:22:18+00:00","fetched_at":"2026-11-10T14:22:18+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"}