{"id":"CVE-2026-124888","kind":"vulnerability","aliases":["CVE-2026-124888"],"related":[],"title":"Firefox: incorrect boundary checks in text layout and fonts code","description":"Incorrect boundary conditions in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.","summary":"Firefox's Layout: Text and Fonts component has incorrect boundary conditions, a memory-safety style flaw. The sources do not say what an attacker can gain from it.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","desktop","firefox","other"],"not_affected_if":["firefox-160-or-later"],"how_to_check":"- Check the Firefox version with `about:support` or the Help menu; versions below `160` on the main channel or below `153.7` on ESR are affected.","fix":"- Firefox `160` and Firefox ESR `153.7`, per the advisory description.","status":"open","published_at":"2026-11-10T14:17:22+00:00","first_seen_at":"2026-11-10T14:22:15+00:00","triaged_at":"2026-11-10T14:26:04+00:00","updated_at":"2026-11-10T14:26:04+00:00","category":"other","confidence":0.5,"triage":{"at":"2026-11-10T14:26:04Z","model":"claude-haiku-5-5","output":{"fix":"- Firefox `160` and Firefox ESR `153.7`, per the advisory description.","reach":"unknown","title":"Firefox: incorrect boundary checks in text layout and fonts code","impact":"medium","summary":"Firefox's Layout: Text and Fonts component has incorrect boundary conditions, a memory-safety style flaw. The sources do not say what an attacker can gain from it.","audience":"everyone","category":"other","nicknames":[],"who_cares":["firefox","browsers","desktop"],"confidence":0.5,"fix_status":"available","needs_auth":"unknown","worst_case":"unknown; the sources do not state the impact","analyst_note":"Check the Mozilla advisory for CVE-2026-124888 to confirm the impact, trigger and whether it is exploited.","how_to_check":"- Check the Firefox version with `about:support` or the Help menu; versions below `160` on the main channel or below `153.7` on ESR are affected.","plain_action":"Update Firefox to version 160 or ESR 153.7 through the browser's update menu.","product_name":"","needs_analyst":true,"not_affected_if":["firefox-160-or-later"],"who_is_affected":"Anyone running a Firefox build older than 160 on the main channel or older than 153.7 on ESR. The sources do not describe the trigger or whether a web page alone is enough to exploit it.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000705,"input_tokens":4490,"output_tokens":512,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-124888':13A,16A '-2026':12A,15A '153.7':67C '160':63C 'attack':44B 'boundari':3A,29B,48C 'browser':17B 'check':4A 'code':10A 'compon':26B,56C 'condit':30B,49C 'cve':11A,14A 'desktop':18B 'esr':66C 'firefox':1A,19B,20B,62C,65C 'fix':60C 'flaw':36B 'font':9A,25B,55C 'gain':46B 'incorrect':2A,28B,47C 'layout':7A,22B,52C 'memori':33B 'memory-safeti':32B 'safeti':34B 'say':41B 'sourc':38B 'style':35B 'text':6A,23B,53C 'vulner':58C","nicknames":[],"mitigations":[],"who_affected":"Anyone running a Firefox build older than 160 on the main channel or older than 153.7 on ESR. The sources do not describe the trigger or whether a web page alone is enough to exploit it.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Firefox to version 160 or ESR 153.7 through the browser's update menu.","pkeys":[],"ptokens":[],"labels":["browsers","desktop","firefox","other","unknown"],"campaign_type":null,"search_a":"'-124888':13A,16A '-2026':12A,15A 'boundari':3A 'check':4A 'code':10A 'cve':11A,14A 'firefox':1A 'font':9A 'incorrect':2A 'layout':7A 'text':6A","search_b":"'attack':44B 'boundari':29B 'browser':17B 'compon':26B 'condit':30B 'desktop':18B 'firefox':19B,20B 'flaw':36B 'font':25B 'gain':46B 'incorrect':28B 'layout':22B 'memori':33B 'memory-safeti':32B 'safeti':34B 'say':41B 'sourc':38B 'style':35B 'text':23B","search_c":"'153.7':67C '160':63C 'boundari':48C 'compon':56C 'condit':49C 'esr':66C 'firefox':62C,65C 'fix':60C 'font':55C 'incorrect':47C 'layout':52C 'text':53C 'vulner':58C","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-2026-124888","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124888","severity":null,"published_at":"2026-11-10T14:17:22+00:00","modified_at":"2026-11-10T14:17:22+00:00","first_seen_at":"2026-11-10T14:22:15+00:00","fetched_at":"2026-11-10T14:22:15+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"}