A vulnerability described as problematic has been identified in mutt up to 2.3.1 . This vulnerability affects the function data_object_to_stream of the file crypt-gpgme.c . Executing a manipulation can lead to incorrect check of function return value. This vulnerability is handled as CVE-2026-43863 . The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.