{"id":"CVE-2026-124918","kind":"vulnerability","aliases":["CVE-2026-124918"],"related":[],"title":"Firefox: WebRender graphics boundary flaw allows privilege escalation","description":"Privilege escalation due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.","summary":"A boundary-condition error in Firefox's WebRender graphics component can let code gain higher privileges than it should have. The description says it is fixed in Firefox 160 and Firefox ESR 153.7.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["desktop-browser","firefox","runtime"],"not_affected_if":["fully-updated-browser"],"how_to_check":"- Check the installed Firefox version in the About Firefox dialog or with `firefox --version`; versions below `160` on the main channel or below `153.7` on ESR are affected.","fix":"- Firefox `160` (main release)\n- Firefox ESR `153.7`","status":"open","published_at":"2026-11-10T14:17:25+00:00","first_seen_at":"2026-11-10T14:22:18+00:00","triaged_at":"2026-11-10T14:24:31+00:00","updated_at":"2026-11-10T14:24:31+00:00","category":"runtime","confidence":0.5,"triage":{"at":"2026-11-10T14:24:31Z","model":"claude-haiku-5-5","output":{"fix":"- Firefox `160` (main release)\n- Firefox ESR `153.7`","reach":"unknown","title":"Firefox: WebRender graphics boundary flaw allows privilege escalation","impact":"high","summary":"A boundary-condition error in Firefox's WebRender graphics component can let code gain higher privileges than it should have. The description says it is fixed in Firefox 160 and Firefox ESR 153.7.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["firefox","desktop-browser"],"confidence":0.5,"fix_status":"available","needs_auth":"unknown","worst_case":"unknown privilege escalation from a web-facing graphics component","analyst_note":"Sources give only the NVD description; check Mozilla's security advisory for trigger conditions, reach and whether the flaw needs a prior compromise.","how_to_check":"- Check the installed Firefox version in the About Firefox dialog or with `firefox --version`; versions below `160` on the main channel or below `153.7` on ESR are affected.","plain_action":"Update Firefox to version 160 or Firefox ESR 153.7 through the browser's own update menu.","product_name":"","needs_analyst":true,"not_affected_if":["fully-updated-browser"],"who_is_affected":"Anyone running Firefox builds older than 160 on the main channel or older than 153.7 on ESR. Exposure depends on the browser being used on untrusted content; the sources do not say whether specific configurations are safer.","user_interaction":"unknown","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000728,"input_tokens":4502,"output_tokens":555,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-124918':11A,14A '-2026':10A,13A '153.7':53B,76C '160':49B,72C 'allow':6A 'boundari':4A,22B,59C 'boundary-condit':21B 'browser':17B 'code':33B 'compon':30B,65C 'condit':23B,60C 'cve':9A,12A 'descript':42B 'desktop':16B 'desktop-brows':15B 'due':56C 'error':24B 'escal':8A,55C 'esr':52B,75C 'firefox':1A,18B,26B,48B,51B,71C,74C 'fix':46B,69C 'flaw':5A 'gain':34B 'graphic':3A,29B,63C 'higher':35B 'incorrect':58C 'let':32B 'privileg':7A,36B,54C 'runtim':19B 'say':43B 'vulner':67C 'webrend':2A,28B,64C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Firefox builds older than 160 on the main channel or older than 153.7 on ESR. Exposure depends on the browser being used on untrusted content; the sources do not say whether specific configurations are safer.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Firefox to version 160 or Firefox ESR 153.7 through the browser's own update menu.","pkeys":[],"ptokens":[],"labels":["desktopbrowser","firefox","runtime","unknown"],"campaign_type":null,"search_a":"'-124918':11A,14A '-2026':10A,13A 'allow':6A 'boundari':4A 'cve':9A,12A 'escal':8A 'firefox':1A 'flaw':5A 'graphic':3A 'privileg':7A 'webrend':2A","search_b":"'153.7':53B '160':49B 'boundari':22B 'boundary-condit':21B 'browser':17B 'code':33B 'compon':30B 'condit':23B 'descript':42B 'desktop':16B 'desktop-brows':15B 'error':24B 'esr':52B 'firefox':18B,26B,48B,51B 'fix':46B 'gain':34B 'graphic':29B 'higher':35B 'let':32B 'privileg':36B 'runtim':19B 'say':43B 'webrend':28B","search_c":"'153.7':76C '160':72C 'boundari':59C 'compon':65C 'condit':60C 'due':56C 'escal':55C 'esr':75C 'firefox':71C,74C 'fix':69C 'graphic':63C 'incorrect':58C 'privileg':54C 'vulner':67C 'webrend':64C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T14:17:25+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-124918","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124918","severity":null,"published_at":"2026-11-10T14:17:25+00:00","modified_at":"2026-11-10T14:17:25+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"}