mutt vulnerabilities

Use of Out-of-range Pointer Offset in mutt

heap OOB write in convert_file_from_to() via a crafted Content-Type header allows attacker to OOB write when email is used as a template.

CVE-2026-43864

mutt before 2.3.2 has a show_sig_summary NULL pointer dereference.

CVE-2026-43863

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

CVE-2026-43862

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

CVE-2026-43861

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

CVE-2026-43860

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

CVE-2026-43859

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

Mutt: neomutt: bcc email header field is indirectly leaked by cryptographic info block

In mutt and neomutt, PGP encryption does not use the --hidden-recipient mode which may leak the Bcc email header field by inferring from the recipients info.

Mutt: neomutt: in-reply-to email header field it not protected by cryptograpic signing

In mutt and neomutt the In-Reply-To email header field is not protected by cryptographic signing which allows an attacker to reuse an unencrypted but signed email message to impersonate the original sender.

Mutt: neomutt: to and cc email header fields are not protected by cryptographic signing

In neomutt and mutt, the To and Cc email headers are not validated by cryptographic signing which allows an attacker that intercepts a message to change their value and include himself as a one of the recipients to compromise message confidentiality.

Undefined Behavior for Input to API in Mutt

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

• Update to 1.13.2-1ubuntu0.6

Undefined Behavior for Input to API in Mutt

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

• Update to 1.13.2-1ubuntu0.6

CVE-2022-1328

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

• Update to 1.13.2-1ubuntu0.5

CVE-2021-32055

Mutt 1.11.0 through 2.0.x before 2.0.7 (and NeoMutt 2019-10-25 through 2021-05-04) has a $imap_qresync issue in which imap/util.c has an out-of-bounds read in situations where an IMAP sequence set ends with a comma. NOTE: the $imap_qresync setting for QRESYNC is not enabled by default.

• Update to 1.13.2-1ubuntu0.5

CVE-2021-3181

rfc822.c in Mutt through 2.0.4 allows remote attackers to cause a denial of service (mailbox unavailability) by sending email messages with sequences of semicolon characters in RFC822 address fields (aka terminators of empty groups). A small email message from the attacker can cause large memory consumption, and the victim may then be unable to see email messages from other persons.

• Update to 1.13.2-1ubuntu0.4

CVE-2020-28896

Mutt before 2.0.2 and NeoMutt before 2020-11-20 did not ensure that $ssl_force_tls was processed if an IMAP server's initial server response was invalid. The connection was not properly closed, and the code could continue attempting to authenticate. This could result in authentication credentials being exposed on an unencrypted connection, or to a machine-in-the-middle.

• Update to 1.13.2-1ubuntu0.3

CVE-2020-14954

Mutt before 1.14.4 and NeoMutt before 2020-06-19 have a STARTTLS buffering issue that affects IMAP, SMTP, and POP3. When a server sends a "begin TLS" response, the client reads additional data (e.g., from a man-in-the-middle attacker) and evaluates it in a TLS context, aka "response injection."

• Update to 1.13.2-1ubuntu0.2

CVE-2020-14154

Mutt before 1.14.3 proceeds with a connection even if, in response to a GnuTLS certificate prompt, the user rejects an expired intermediate certificate.

• Update to 1.13.2-1ubuntu0.1

CVE-2020-14093

Mutt before 1.14.3 allows an IMAP fcc/postpone man-in-the-middle attack via a PREAUTH response.

• Update to 1.13.2-1ubuntu0.1