RLSA-2026:2128 Moderate: python3 security update

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fixes:...

EUVD-2026-29922

A vulnerability exists where a connection requiring TLS incorrectly reuses an existing unencrypted connection from the same connection pool. If an initial transfer is made in clear-text via IMAP, SMTP, or POP3, a subsequent request to that same host bypasses the TLS requirement and instead transm...

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-2026-40030

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...

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...

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...

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...

PT-2026-36986

Name of the Vulnerable Software and Affected Versions Net::IMAP affected versions not specified Description Net::IMAP::ResponseReader exhibits quadratic time complexity when processing large responses containing numerous string literals. A hostile server can send specially crafted responses that...

CVE-2026-4873

A flaw was found in curl. A remote attacker could exploit this by initiating an unencrypted connection via IMAP, SMTP, or POP3 and then making a subsequent request to the same host that requires Transport Layer Security TLS. Due to incorrect connection reuse, the subsequent request would bypass t...

thunderbird: Out of bounds read in IMAP parsing

A flaw was found in Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue: A malicious mail server could send malformed strings with negative lengths, causing the parser to read memory outside the buffer. If a mail server or connection to a mail server were...

[SECURITY] Fedora 44 Update: nss-3.121.0-1.fc44

Network Security Services NSS is a set of libraries designed to support cross-platform development of security-enabled client and server applications. Applications built with NSS can support SSL v2 and v3, TLS, PKCS 5, PKCS 7, PKCS 11, PKCS 12, S/MIME, X.509 v3 certificates, and other security...

Mozilla Thunderbird Spoofing Vulnerability (CNVD-2026-16380)

Mozilla Thunderbird is the United States Mozilla Foundation's set of independent from the Mozilla Application Suite e-mail client software. The program supports IMAP, POP mail protocols and HTML mail format. A spoofing vulnerability exists in Mozilla Thunderbird, which can be exploited by attacke...