{"cve":{"cve_id":"CVE-2019-17026","is_kev":true,"kev_date_added":"2021-11-03","kev_vendor_project":"Mozilla","kev_product":"Firefox and Thunderbird","kev_vulnerability_name":"Mozilla Firefox And Thunderbird Type Confusion Vulnerability","kev_short_description":"Mozilla Firefox and Thunderbird contain a type confusion vulnerability due to incorrect alias information in the IonMonkey JIT compiler when setting array elements.","kev_required_action":"Apply updates per vendor instructions.","kev_due_date":"2022-05-03","kev_known_ransomware":false,"kev_notes":"https://nvd.nist.gov/vuln/detail/CVE-2019-17026","kev_cwes":["CWE-843"],"epss_score":0.46589,"epss_percentile":0.98666,"epss_as_of":"2026-06-23","description":"Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion. We are aware of targeted attacks in the wild abusing this flaw. 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