CVE-2026-92239

Name of the Vulnerable Software and Affected Versions Thunderbird versions prior to 140.16 Thunderbird versions prior to 153.3 Thunderbird versions prior to 156

Description An out-of-bounds buffer read can be triggered by a maliciously constructed IMAP line. An out-of-bounds read occurs when the software reads data past the end of the intended buffer, potentially leading to information disclosure or application crashes.

Recommendations Update to version 140.16 Update to version 153.3 Update to version 156