{"id":"CVE-2019-17026","aliases":[],"url":"https://o3.security/vulnerability/CVE-2019-17026","summary":null,"details":"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. This vulnerability affects Firefox ESR < 68.4.1, Thunderbird < 68.4.1, and Firefox < 72.0.1.","published":"2020-03-02T05:15:12.010Z","modified":"2026-04-16T04:37:53.785493818Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"epss":{"score":0.46589,"percentile":0.98727,"asOf":"2026-08-25"},"cisaKev":{"dateAdded":"2021-11-03","dueDate":"2022-05-03","knownRansomwareCampaignUse":false},"exploitsKnown":9,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-17026"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202003-02"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4335-1/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2020-03/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2020-04/"},{"type":"REPORT","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1607443"},{"type":"EVIDENCE","url":"http://packetstormsecurity.com/files/162568/Firefox-72-IonMonkey-JIT-Type-Confusion.html"}],"provenance":{"sources":["OSV.dev","CISA KEV","FIRST.org (EPSS)"],"lastVerified":"2026-04-16T04:37:53.785493818Z"}}