{"id":"CVE-2026-124927","kind":"vulnerability","aliases":["CVE-2026-124927"],"related":[],"title":"Firefox: WebRender graphics flaw breaks site isolation, fixed in 160","description":"Site isolation issue in the Graphics: WebRender component. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.","summary":"A site isolation flaw in Firefox's WebRender graphics component can let content from one website cross into another site's context. The sources do not describe the exact attacker capability beyond this.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","firefox","other"],"not_affected_if":["firefox-160-or-later","firefox-esr-153.7-or-later"],"how_to_check":"- Check the Firefox version with `about:support` or the Help menu; the sources name Firefox 160 and Firefox ESR 153.7 as fixed.\n- Confirm the ESR channel in use if the browser is on Extended Support Release.","fix":"- Firefox: `160` or later\n- Firefox ESR: `153.7` or later","status":"open","published_at":"2026-11-10T14:17:26+00:00","first_seen_at":"2026-11-10T14:22:18+00:00","triaged_at":"2026-11-10T14:24:21+00:00","updated_at":"2026-11-10T14:24:21+00:00","category":"other","confidence":0.5,"triage":{"at":"2026-11-10T14:24:21Z","model":"claude-haiku-5-5","output":{"fix":"- Firefox: `160` or later\n- Firefox ESR: `153.7` or later","reach":"internet","title":"Firefox: WebRender graphics flaw breaks site isolation, fixed in 160","impact":"medium","summary":"A site isolation flaw in Firefox's WebRender graphics component can let content from one website cross into another site's context. The sources do not describe the exact attacker capability beyond this.","audience":"everyone","category":"other","nicknames":[],"who_cares":["firefox","browsers"],"confidence":0.5,"fix_status":"available","needs_auth":"unknown","worst_case":"Content from one website may read or act across site boundaries.","analyst_note":"","how_to_check":"- Check the Firefox version with `about:support` or the Help menu; the sources name Firefox 160 and Firefox ESR 153.7 as fixed.\n- Confirm the ESR channel in use if the browser is on Extended Support Release.","plain_action":"Update Firefox to version 160 or the ESR version 153.7 through its update settings.","product_name":"","needs_analyst":false,"not_affected_if":["firefox-160-or-later","firefox-esr-153.7-or-later"],"who_is_affected":"Anyone running Firefox or Firefox ESR older than the fixed versions named in the sources. The sources do not state the exact trigger or whether any special setting is needed.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000704,"input_tokens":4478,"output_tokens":512,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-124927':13A,16A '-2026':12A,15A '153.7':69C '160':10A,65C 'anoth':37B 'attack':48B 'beyond':50B 'break':5A 'browser':17B 'capabl':49B 'compon':28B,58C 'content':31B 'context':40B 'cross':35B 'cve':11A,14A 'describ':45B 'esr':68C 'exact':47B 'firefox':1A,18B,24B,64C,67C 'fix':8A,62C 'flaw':4A,22B 'graphic':3A,27B,56C 'isol':7A,21B,52C 'issu':53C 'let':30B 'one':33B 'site':6A,20B,38B,51C 'sourc':42B 'vulner':60C 'webrend':2A,26B,57C 'websit':34B","nicknames":[],"mitigations":[],"who_affected":"Anyone running Firefox or Firefox ESR older than the fixed versions named in the sources. The sources do not state the exact trigger or whether any special setting is needed.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Firefox to version 160 or the ESR version 153.7 through its update settings.","pkeys":[],"ptokens":[],"labels":["browsers","firefox","other","unknown"],"campaign_type":null,"search_a":"'-124927':13A,16A '-2026':12A,15A '160':10A 'break':5A 'cve':11A,14A 'firefox':1A 'fix':8A 'flaw':4A 'graphic':3A 'isol':7A 'site':6A 'webrend':2A","search_b":"'anoth':37B 'attack':48B 'beyond':50B 'browser':17B 'capabl':49B 'compon':28B 'content':31B 'context':40B 'cross':35B 'describ':45B 'exact':47B 'firefox':18B,24B 'flaw':22B 'graphic':27B 'isol':21B 'let':30B 'one':33B 'site':20B,38B 'sourc':42B 'webrend':26B 'websit':34B","search_c":"'153.7':69C '160':65C 'compon':58C 'esr':68C 'firefox':64C,67C 'fix':62C 'graphic':56C 'isol':52C 'issu':53C 'site':51C 'vulner':60C 'webrend':57C","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-2026-124927","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124927","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"}