CVE-2026-53533

aiosmtplib is an asynchronous SMTP client for use with asyncio. Prior to 5.1.1, SMTP.mail, SMTP.rcpt, SMTP.vrfy, and SMTP.expn send caller-supplied addresses without rejecting embedded CR or LF bytes. Data after the line break is framed as additional standalone SMTP command lines, allowing an...

CVE-2026-53533 aiosmtplib: SMTP command injection via CR/LF in sender/recipient address

aiosmtplib is an asynchronous SMTP client for use with asyncio. Prior to 5.1.1, SMTP.mail, SMTP.rcpt, SMTP.vrfy, and SMTP.expn send caller-supplied addresses without rejecting embedded CR or LF bytes. Data after the line break is framed as additional standalone SMTP command lines, allowing an...

CVE-2026-53533

aiosmtplib's SMTP.mail(), SMTP.rcpt(), SMTP.vrfy(), and SMTP.expn() methods transmit caller-supplied addresses without filtering CR/LF bytes, allowing SMTP command injection (CWE-93/CWE-77) when attacker-influenced addresses are passed. This enables desynchronization, client hangs, or arbitrary m...

CVE-2026-53533 aiosmtplib: SMTP command injection via CR/LF in sender/recipient address

aiosmtplib is an asynchronous SMTP client for use with asyncio. Prior to 5.1.1, SMTP.mail, SMTP.rcpt, SMTP.vrfy, and SMTP.expn send caller-supplied addresses without rejecting embedded CR or LF bytes. Data after the line break is framed as additional standalone SMTP command lines, allowing an...

CVE-2026-30227

MimeKit is a C library which may be used for the creation and parsing of messages using the Multipurpose Internet Mail Extension MIME, as defined by numerous IETF specifications. Prior to version 4.15.1, a CRLF injection vulnerability in MimeKit allows an attacker to embed \r\n into the SMTP...

UBUNTU-CVE-2016-9920

steps/mail/sendmail.inc in Roundcube before 1.1.7 and 1.2.x before 1.2.3, when no SMTP server is configured and the sendmail program is enabled, does not properly restrict the use of custom envelope-from addresses on the sendmail command line, which allows remote authenticated users to execute...

Postfix 1.1.x Denial of Service Vulnerabilities (1)

No description provided by source. source: http://www.securityfocus.com/bid/8333/info Debian has reported two vulnerabilities in the Postfix mail transfer agent. The first vulnerability, CAN-2003-0468, can allow for an adversary to bounce-scan a private network. It has also been reported that thi...

Postfix 1.1.x Denial of Service Vulnerabilities (2)

No description provided by source. source: http://www.securityfocus.com/bid/8333/info Debian has reported two vulnerabilities in the Postfix mail transfer agent. The first vulnerability, CAN-2003-0468, can allow for an adversary to bounce-scan a private network. It has also been reported that thi...

Mandrake Linux Security Advisory : postfix (MDKSA-2003:081)

Two vulnerabilities were discovered in the postfix MTA by Michal Zalewski. Versions prior to 1.1.12 would allow an attacker to bounce- scan private networks or use the daemon as a DDoS Distributed Denial of Service tool by forcing the daemon to connect to an arbitrary service at an arbitrary IP...

Postfix vulnerable to DoS by supplying a remote SMTP listener with a malformed envelope address

Overview A denial-of-service vulnerability exists in all versions of Postfix prior to 2.0. This vulnerability may allow a remote attacker to cause mail service interruption. Description Postfix is a very popular mail transfer agent MTA. Michal Zalewski has discovered a denial-of-service...

CVE-2003-0540

The address parser code in Postfix 1.1.12 and earlier allows remote attackers to cause a denial of service lock via 1 a malformed envelope address to a local host that would generate a bounce and contains the ".!" string in the MAIL FROM or Errors-To headers, which causes nqmgr to lock up, or 2 v...