An issue was discovered in Mutt before 1.10.1 and NeoMutt before 2018-07-16. They have a buffer overflow via base64 data.
An issue was discovered in Mutt before 1.10.1 and NeoMutt before 2018-07-16. imap/message.c has a stack-based buffer overflow for a FETCH response with a long RFC822.SIZE field.
A flaw was found in mutt before 1.10.1. There is a path traversal flaw for UID values in POP bcache directory.
References:
http://www.mutt.org/news.html https://gitlab.com/muttmua/mutt/blob/master/ChangeLog
An issue was discovered in Mutt before 1.10.1 and NeoMutt before 2018-07-16. imapquotestring in imap/util.c has an integer underflow.
An issue was discovered in Mutt before 1.10.1 and NeoMutt before 2018-07-16. They allow remote IMAP servers to execute arbitrary commands via backquote characters, related to the mailboxes command associated with an automatic subscription.
An issue was discovered in Mutt before 1.10.1 and NeoMutt before 2018-07-16. pop.c mishandles a zero-length UID.
A flaw was found in mutt before 1.10.1. When "subscribing" to an IMAP mailbox, either via $imapchecksubscribed, or via the <subscribe> function in the browser menu, the lack of proper input parsing may lead to remote code injection from a malicous IMAP server.
Upstream patch:
References:
http://www.mutt.org/news.html https://gitlab.com/muttmua/mutt/blob/master/ChangeLog
Last updated 16 January 2025
Vulnerability in RFC822 address parser in mutt before 1.2.5.1 and mutt 1.3.x before 1.3.25 allows remote attackers to execute arbitrary commands via an improperly terminated comment or phrase in the address list.
Format string vulnerability in Mutt before 1.2.5 allows a remote malicious IMAP server to execute arbitrary commands.
Mutt mail client allows a remote attacker to execute commands via shell metacharacters.
Buffer overflow in Mutt 1.4.0 and possibly earlier versions, 1.5.x up to 1.5.3, and other programs that use Mutt code such as Balsa before 2.0.10, allows a remote malicious IMAP server to cause a denial of service (crash) and possibly execute arbitrary code via a crafted folder.
Multiple off-by-one buffer overflows in the IMAP capability for Mutt 1.3.28 and earlier, and Balsa 1.2.4 and earlier, allow a remote malicious IMAP server to cause a denial of service (crash) and possibly execute arbitrary code via a specially crafted mail folder, a different vulnerability than CVE-2003-0140.
Buffer overflow in the muttdecodexbit function in Handler.c for Mutt 1.5.10 allows remote attackers to execute arbitrary code, possibly due to interactions with libiconv or gettext.
The IMAP Client, as used in mutt 1.4.1 and Balsa 2.0.10, allows remote malicious IMAP servers to cause a denial of service and possibly execute arbitrary code via certain large mailbox size values that cause either integer signedness errors or integer overflow errors.
Buffer overflow in the index menu code (menupadstring of menu.c) for Mutt 1.4.1 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via certain mail messages.
Stack-based buffer overflow in the browsegetnamespace function in imap/browse.c of Mutt 1.4.2.1 and earlier allows remote attackers to cause a denial of service (crash) or execute arbitrary code via long namespaces received from the IMAP server.
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.
Null pointer dereference when viewing a specially crafted email in Mutt 1.5.2 <2.2.12
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.
Last updated 25 August 2025
Last updated 25 August 2025
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.
Null pointer dereference when composing from a specially crafted draft message in Mutt >1.5.2 <2.2.12
Mutt before 1.5.20 patch 7 allows an attacker to cause a denial of service via a series of requests to mutt temporary files.
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.
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.
Last updated 16 January 2025
An issue was discovered in Mutt before 1.10.1 and NeoMutt before 2018-07-16. imap/util.c mishandles ".." directory traversal in a mailbox name.
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