VULNERABILITY INTELLIGENCE

CVE-2019-9819

CVSS score9.8 CRITICAL
EPSS probability1.69%
CISA KEVNot currently listed
Published2019-07-23
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 a JavaScript compartment mismatch can occur while working with the fetch API, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.

Weakness classification

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

Primary references