CVE-2019-11691

CRITICAL

Thunderbird <60.7-Firefox <67-Firefox ESR <60.7 - Use After Free

Title source: llm
STIX 2.1

Description

A use-after-free vulnerability can occur when working with XMLHttpRequest (XHR) in an event loop, causing the XHR main thread to be called after it has been freed. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.

References (4)

Core 4
Core References
Issue Tracking, Permissions Required, Vendor Advisory x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1542465

Scores

CVSS v3 9.8
EPSS 0.0051
EPSS Percentile 66.4%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-416
Status published
Products (3)
mozilla/firefox < 67.0
mozilla/firefox_esr < 60.7
mozilla/thunderbird < 60.7
Published Jul 23, 2019
Tracked Since Feb 18, 2026