VULNERABILITY INTELLIGENCE

CVE-2019-9795

CVSS score9.8 CRITICAL
EPSS probability1.70%
CISA KEVNot currently listed
Published2019-04-26
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

A vulnerability where type-confusion in the IonMonkey just-in-time (JIT) compiler could potentially be used by malicious JavaScript to trigger a potentially exploitable crash. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

Weakness classification

  • CWE-617: Reachable Assertion
  • CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')

Primary references