{"id":"CVE-2026-124921","kind":"vulnerability","aliases":["CVE-2026-124921"],"related":[],"title":"Firefox: WebGPU sandbox escape lets a web page break out of its sandbox","description":"Sandbox escape in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 160.","summary":"A flaw in the Graphics: WebGPU component of Firefox allows a sandbox escape, according to the NVD entry. The description says it was fixed in Firefox 160, and an attacker who exploits it could escape the browser's sandbox.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"Firefox","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["firefox","other","webgpu"],"not_affected_if":[],"how_to_check":"- Check the installed Firefox version, for example in the About Firefox dialog, and compare it to `160`","fix":"- Firefox `160`","status":"open","published_at":"2026-11-10T14:17:25+00:00","first_seen_at":"2026-11-10T14:22:18+00:00","triaged_at":"2026-11-10T14:24:28+00:00","updated_at":"2026-11-10T14:24:28+00:00","category":"other","confidence":0.5,"triage":{"at":"2026-11-10T14:24:28Z","model":"claude-haiku-5-5","output":{"fix":"- Firefox `160`\n- unknown","reach":"internet","title":"Firefox: WebGPU sandbox escape lets a web page break out of its sandbox","impact":"high","summary":"A flaw in the Graphics: WebGPU component of Firefox allows a sandbox escape, according to the NVD entry. The description says it was fixed in Firefox 160, and an attacker who exploits it could escape the browser's sandbox.","audience":"everyone","category":"other","nicknames":[],"who_cares":["firefox","webgpu"],"confidence":0.5,"fix_status":"available","needs_auth":"unknown","worst_case":"Attacker escapes browser sandbox and reaches the underlying system","analyst_note":"Confirm affected Firefox version range and whether the sandbox escape needs user interaction, using the NVD entry at https://nvd.nist.gov/vuln/detail/CVE-2026-124921 and Mozilla's advisory.","how_to_check":"- Check the installed Firefox version, for example in the About Firefox dialog, and compare it to `160`\n- unknown","plain_action":"Update Firefox to version 160 or later.","product_name":"Firefox","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"unknown","product_ecosystem":"vendor","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000694,"input_tokens":4467,"output_tokens":494,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-124921':16A,19A '-2026':15A,18A '160':50B,76C 'accord':37B 'allow':33B 'attack':53B 'break':9A 'browser':60B 'compon':30B,69C 'could':57B 'cve':14A,17A 'descript':43B 'entri':41B 'escap':4A,36B,58B,64C 'exploit':55B 'firefox':1A,20A,21B,32B,49B,75C 'fix':47B,73C 'flaw':25B 'graphic':28B,67C 'let':5A 'nvd':40B 'page':8A 'sandbox':3A,13A,35B,62B,63C 'say':44B 'vulner':71C 'web':7A 'webgpu':2A,23B,29B,68C","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.","pkeys":["firefox"],"ptokens":["firefox"],"labels":["firefox","other","unknown","vendor","webgpu"],"campaign_type":null,"search_a":"'-124921':16A,19A '-2026':15A,18A 'break':9A 'cve':14A,17A 'escap':4A 'firefox':1A,20A 'let':5A 'page':8A 'sandbox':3A,13A 'web':7A 'webgpu':2A","search_b":"'160':50B 'accord':37B 'allow':33B 'attack':53B 'browser':60B 'compon':30B 'could':57B 'descript':43B 'entri':41B 'escap':36B,58B 'exploit':55B 'firefox':21B,32B,49B 'fix':47B 'flaw':25B 'graphic':28B 'nvd':40B 'sandbox':35B,62B 'say':44B 'webgpu':23B,29B","search_c":"'160':76C 'compon':69C 'escap':64C 'firefox':75C 'fix':73C 'graphic':67C 'sandbox':63C 'vulner':71C 'webgpu':68C","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-2026-124921","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124921","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"}