mutt before 2.3.2 has a show_sig_summary NULL pointer dereference.

mutt before 2.3.2 has an infinite loop in data_object_to_stream in crypt-gpgme.c.

In mutt before 2.3.2, the imap_auth_gss security level is mishandled.

mutt before 2.3.2 does not check for '\0' in url_pct_decode.

mutt before 2.3.2 sometimes truncates the hash_passwd by one byte for IMAP auth_cram MD5 digest.

mutt before 2.3.2 sometimes uses strfcpy instead of memcpy for the IMAP auth_cram MD5 digest.

Null pointer dereference when composing from a specially crafted draft message in Mutt >1.5.2 <2.2.12

Null pointer dereference when viewing a specially crafted email in Mutt >1.5.2 <2.2.12

Buffer Overflow in uudecoder in Mutt affecting all versions starting from 0.94.13 before 2.2.3 allows read past end of input line

Mutt does not verify that the smtps server hostname matches the domain name of the subject of an X.509 certificate, which allows man-in-the-middle attackers to spoof an SSL SMTP server via an arbitrary certificate, a different vulnerability than CVE-2009-3766.