CVE-2026-84641 | Mozilla Thunderbird up to 140.14/153.1/154 IMAP ID prefs.js use after free

September 1, 2026 Yanac

A vulnerability classified as critical was found in Mozilla Thunderbird up to 140.14/153.1/154. Affected by this vulnerability is an unknown functionality of the file prefs.js of the component IMAP ID Handler. Executing a manipulation can lead to use after free.

This vulnerability is handled as CVE-2026-84641. The attack can be executed remotely. There is not any exploit available.

Upgrading the affected component is advised.VulDB Recent EntriesRead More