VULNERABILITY INTELLIGENCE
CVE-2019-17026
CVSS score8.8 HIGH
EPSS probability46.31%
CISA KEVKnown exploited vulnerability
Published2020-03-02
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Known Exploited Vulnerability
Mozilla Firefox And Thunderbird Type Confusion Vulnerability
Vendor / product: Mozilla / Firefox and Thunderbird
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. This vulnerability affects Firefox ESR < 68.4.1, Thunderbird < 68.4.1, and Firefox < 72.0.1.
Weakness classification
- nvd@nist.gov: CWE-843
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-843
Primary references
- security@mozilla.org — Exploit, Third Party Advisory, VDB Entry
- security@mozilla.org — Issue Tracking
- security@mozilla.org — Third Party Advisory
- security@mozilla.org — Third Party Advisory
- security@mozilla.org — Vendor Advisory
- security@mozilla.org — Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory, VDB Entry
- af854a3a-2127-422b-91ae-364da2661108 — Issue Tracking
- af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Vendor Advisory
- af854a3a-2127-422b-91ae-364da2661108 — Vendor Advisory