CVE-2019-11691

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.

• CWE-416

• https://bugzilla.mozilla.org/show_bug.cgi?id=1542465Issue Tracking, Permissions Required, Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2019-13/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2019-14/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2019-15/Vendor Advisory
• https://bugzilla.mozilla.org/show_bug.cgi?id=1542465Issue Tracking, Permissions Required, Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2019-13/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2019-14/Vendor Advisory
• https://www.mozilla.org/security/advisories/mfsa2019-15/Vendor Advisory

Published

Jul 23, 2019

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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