CVE-2019-11706

HIGH

Thunderbird <60.7.1 - Use After Free

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2019-11706. PoCs published by X41 D-Sec GmbH.

AI-analyzed exploit summary The advisory describes a type confusion vulnerability in Thunderbird's libical implementation, which can be triggered by a malformed calendar attachment. The issue arises from improper handling of TZID properties, potentially leading to crashes or information leaks.

Description

A flaw in Thunderbird's implementation of iCal causes a type confusion in icaltimezone_get_vtimezone_properties when processing certain email messages, resulting in a crash. This vulnerability affects Thunderbird < 60.7.1.

Exploits (1)

exploitdb WRITEUP
by X41 D-Sec GmbH · textdosmultiple
https://www.exploit-db.com/exploits/47001

The advisory describes a type confusion vulnerability in Thunderbird's libical implementation, which can be triggered by a malformed calendar attachment. The issue arises from improper handling of TZID properties, potentially leading to crashes or information leaks.

Classification
Writeup 90%
Attack Type
Dos | Info Leak
Complexity
Moderate
Reliability
Theoretical
Target: Thunderbird (all versions before ESR 60.7.XXX)
No auth needed
Prerequisites: Attacker must send a specially crafted calendar attachment to the victim
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Issue Tracking, Permissions Required, Vendor Advisory x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1555646
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/201908-20

Scores

CVSS v3 7.5
EPSS 0.0973
EPSS Percentile 94.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-843
Status published
Products (1)
mozilla/thunderbird < 60.7.1
Published Jul 23, 2019
Tracked Since Feb 18, 2026