CVE-2026-42006

An attacker can cause uncontrolled memory usage with excessive bracing over IMAP. The fix in CVE-2026-27857 was incomplete, only blocking one way of doing this, so there was still another way left open. In particular, the fix was for closing braces, but you could still use open braces to bypass t...

CVE-2026-42006

An attacker can cause uncontrolled memory usage with excessive bracing over IMAP. The fix in CVE-2026-27857 was incomplete, only blocking one way of doing this, so there was still another way left open. In particular, the fix was for closing braces, but you could still use open braces to bypass t...

PT-2026-40431

PowerSYSTEM Center email notification service is affected by a CRLF injection vulnerability when using SMTPS communication...

PT-2026-40030

Name of the Vulnerable Software and Affected Versions dovecot versions prior to 2.4.4-1.1 Description An attacker can cause uncontrolled memory usage via excessive bracing over IMAP. A previous fix was incomplete as it only blocked closing braces, allowing the memory limit to be bypassed using op...

Unity Linux 20.1060e / 20.1070e Security Update: curl (UTSA-2026-017570)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-017570 advisory. When curl = 7.20.0 and = 7.78.0 connects to an IMAP or POP3 server to retrieve data using STARTTLS to upgrade to TLS security, the server can respond and send back...

Unity Linux 20.1060e / 20.1070e Security Update: fetchmail (UTSA-2026-017438)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-017438 advisory. Fetchmail before 6.4.22 fails to enforce STARTTLS session encryption in some circumstances, such as a certain situation with IMAP and PREAUTH. Tenable has extracted...

DEBIAN-CVE-2026-42246

Net::IMAP implements Internet Message Access Protocol IMAP client functionality in Ruby. Prior to versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4, a man-in-the-middle attacker can cause Net::IMAPstarttls to return "successfully", without starting TLS. This issue has been patched in versions 0.3.10,...

DEBIAN-CVE-2026-42257

Net::IMAP implements Internet Message Access Protocol IMAP client functionality in Ruby. Prior to versions 0.4.24, 0.5.14, and 0.6.4, several Net::IMAP commands accept a raw string argument that is sent to the server without validation or escaping. If this string is derived from user-controlled...

DEBIAN-CVE-2026-42245

Net::IMAP implements Internet Message Access Protocol IMAP client functionality in Ruby. Prior to versions 0.4.24, 0.5.14, and 0.6.4, Net::IMAP::ResponseReader has quadratic time complexity when reading large responses containing many string literals. A hostile server can send responses which are...

CVE-2026-42256

Net::IMAP implements Internet Message Access Protocol IMAP client functionality in Ruby. From versions 0.4.0 to before 0.4.24, 0.5.0 to before 0.5.14, and 0.6.0 to before 0.6.4, when authenticating a connection with SCRAM-SHA1 or SCRAM-SHA256, a hostile server can perform a computational...

EUVD-2026-28927

Net::IMAP implements Internet Message Access Protocol IMAP client functionality in Ruby. Prior to versions 0.4.24, 0.5.14, and 0.6.4, symbol arguments to commands are vulnerable to a CRLF Injection / IMAP Command injection via Symbol arguments passed to IMAP commands. This issue has been patched ...

CVE-2026-43862

A flaw was found in mutt, an email client. The imapauthgss security level, which is used for secure IMAP Internet Message Access Protocol authentication, is mishandled. This vulnerability could allow an attacker to bypass certain security protections, potentially leading to a low impact on data...

CVE-2026-43860

A flaw was found in mutt. During the IMAP CRAM-MD5 Challenge-Response Authentication Mechanism - Message-Digest Algorithm 5 authentication, the password hash is truncated by one byte. This issue could allow a remote attacker to potentially bypass authentication, leading to unauthorized access...

CLSA-2026-1777977059 dovecot: Fix of CVE-2026-27857

CVE-2026-27857: limit the number of open IMAP parser lists in imap-login to prevent excessive memory usage from deeply nested parentheses e.g. NOOP...

GHSA-HM49-WCQC-G2XG net-imap vulnerable to command Injection via "raw" arguments to multiple commands

Summary Several Net::IMAP commands accept a raw string argument that is sent to the server without validation or escaping. If this string is derived from user-controlled input, it may contain contain CRLF sequences, which an attacker can use to inject arbitrary IMAP commands. Details Net::IMAP's...

GHSA-Q2MW-FVJ9-VVCW net-imap has quadratic complexity when reading response literals

Summary Net::IMAP::ResponseReader has quadratic time complexity when reading large responses containing many string literals. A hostile server can send responses which are crafted to exhaust the client's CPU for a denial of service attack. Details For each literal in a response, ResponseReader...

EUVD-2026-26896

mutt before 2.3.2 sometimes truncates the hashpasswd by one byte for IMAP authcram MD5 digest...

EUVD-2026-26895

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

CVE-2026-43859

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

PT-2026-36772

Name of the Vulnerable Software and Affected Versions mutt versions prior to 2.3.2 Description The software sometimes uses the strfcpy function instead of memcpy when handling the IMAP auth cram MD5 digest. This occurs during the authentication process for IMAP servers using the CRAM-MD5 mechanis...