Astra Linux – Vulnerability in dovecot

A mail message containing an excessive number of RFC 2231 MIME parameters causes LMTP to consume too much CPU resources. A properly formatted mail message prevents the mail delivery process from consuming excessive CPU time. Use MTA capabilities to limit the number of RFC 2231 MIME parameters in...

CVE-2026-27852

An attacker that can send mail to a user can craft a message whose headers contain a very large number of email addresses or MIME parameters, which causes excessive memory usage when the message is later parsed. The message is still delivered, but reading it over IMAP can exhaust the memory limit...

CVE-2026-27852

CVE-2026-27852 affects Dovecot (Open-Xchange), the IMAP mail server. An attacker who can send mail to a user can craft a message whose headers contain a very large number of email addresses or MIME parameters , causing excessive memory consumption when the message is later parsed. Although the me...

CVE-2026-27852

An attacker that can send mail to a user can craft a message whose headers contain a very large number of email addresses or MIME parameters, which causes excessive memory usage when the message is later parsed. The message is still delivered, but reading it over IMAP can exhaust the memory limit...

CVE-2026-27852

An attacker that can send mail to a user can craft a message whose headers contain a very large number of email addresses or MIME parameters, which causes excessive memory usage when the message is later parsed. The message is still delivered, but reading it over IMAP can exhaust the memory limit...

UBUNTU-CVE-2026-27852

An attacker that can send mail to a user can craft a message whose headers contain a very large number of email addresses or MIME parameters, which causes excessive memory usage when the message is later parsed. The message is still delivered, but reading it over IMAP can exhaust the memory limit...

PT-2026-83050

Name of the Vulnerable Software and Affected Versions dovecot versions prior to 2.4.5-1.1 Description An attacker can send a crafted email with headers containing an excessive number of email addresses or MIME parameters. When the message is parsed via IMAP, it leads to excessive memory...

SUSE SLES12 Security Update : dovecot22 (SUSE-SU-2026:1641-1)

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1641-1 advisory. - CVE-2025-59031: decode2text.sh OOXML extraction may follow symlinks and read unintended files during indexing bsc1260895. - CVE-2025-59032:...

Security update for dovecot22

This update for dovecot22 fixes the following issues: CVE-2025-59031: decode2text.sh OOXML extraction may follow symlinks and read unintended files during indexing bsc1260895. CVE-2025-59032: pigeonhole: ManageSieve panic occurs with sieve-connect as a client bsc1260902. CVE-2026-27855: OTP drive...

📄 Dovecot MIME Parameter CPU Exhaustion

This Metasploit module targets a denial of service vulnerability in the Dovecot LMTP service caused by excessive CPU consumption. ================================================================================================================================== | Title : Dovecot MIME Parameter CPU...

SUSE-SU-2026:21208-1 Security update for dovecot24

This update for dovecot24 fixes the following issues: - Update to v2.4.3 - CVE-2025-59028: Invalid base64 authentication can cause DoS for other logins bsc1260894. - CVE-2025-59031: decode2text.sh OOXML extraction may follow symlinks and read unintended files during indexing bsc1260895. -...

OPENSUSE-SU-2026:20554-1 Security update for dovecot24

This update for dovecot24 fixes the following issues: - Update to v2.4.3 - CVE-2025-59028: Invalid base64 authentication can cause DoS for other logins bsc1260894. - CVE-2025-59031: decode2text.sh OOXML extraction may follow symlinks and read unintended files during indexing bsc1260895. -...

SUSE CVE-2026-27859

A mail message containing excessive amount of RFC 2231 MIME parameters causes LMTP to use too much CPU. A suitably formatted mail message causes mail delivery process to consume large amounts of CPU time. Use MTA capabilities to limit RFC 2231 MIME parameters in mail messages, or upgrade to fixed...

Linux Distros Unpatched Vulnerability : CVE-2026-27859

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A mail message containing excessive amount of RFC 2231 MIME parameters causes LMTP to use too much CPU. A suitably formatted mail message causes mail delivery...

CVE-2026-27859

A flaw was found in Dovecot. A remote attacker can exploit this vulnerability by sending a specially crafted mail message containing an excessive amount of RFC 2231 MIME parameters. This can cause the Local Mail Transfer Protocol LMTP process to consume large amounts of CPU time, leading to a...

EUVD-2026-16571

A mail message containing excessive amount of RFC 2231 MIME parameters causes LMTP to use too much CPU. A suitably formatted mail message causes mail delivery process to consume large amounts of CPU time. Use MTA capabilities to limit RFC 2231 MIME parameters in mail messages, or upgrade to fixed...

CVE-2026-27859

A mail message containing excessive amount of RFC 2231 MIME parameters causes LMTP to use too much CPU. A suitably formatted mail message causes mail delivery process to consume large amounts of CPU time. Use MTA capabilities to limit RFC 2231 MIME parameters in mail messages, or upgrade to fixed...

ALPINE-CVE-2026-27859

A mail message containing excessive amount of RFC 2231 MIME parameters causes LMTP to use too much CPU. A suitably formatted mail message causes mail delivery process to consume large amounts of CPU time. Use MTA capabilities to limit RFC 2231 MIME parameters in mail messages, or upgrade to fixed...

CVE-2026-27859

The CVE-2026-27859 issue concerns LMTP processing of mail messages with excessive RFC 2231 MIME parameters, which can cause unusually high CPU usage in the mail delivery process. Affected systems are those that rely on LMTP for mail transfer; the underlying cause is the handling/parsing of RFC 22...

CVE-2026-27859

A mail message containing excessive amount of RFC 2231 MIME parameters causes LMTP to use too much CPU. A suitably formatted mail message causes mail delivery process to consume large amounts of CPU time. Use MTA capabilities to limit RFC 2231 MIME parameters in mail messages, or upgrade to fixed...