Oracle Linux 9 : dovecot (ELSA-2026-41905)

The remote Oracle Linux 9 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-41905 advisory. 1:2.3.16-18.1 - fix CVE-2026-42006: IMAP parser listcountlimit bypass via open parentheses RHEL-188468 Tenable has extracted the preceding description block...

Important: Red Hat Security Advisory: dovecot security update

An update for dovecot is now available for Red Hat Enterprise Linux 10.0 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available fo...

Important: Red Hat Security Advisory: dovecot security update

An update for dovecot is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from...

dovecot: Dovecot: Denial of Service via excessive IMAP bracing

A flaw was found in Dovecot. A remote attacker can exploit this vulnerability by sending excessive open braces over the Internet Message Access Protocol IMAP, leading to uncontrolled memory usage. This can cause the affected system to consume memory up to its configured limit, resulting in a Deni...

Oracle Linux 10 : dovecot (ELSA-2026-41988)

The remote Oracle Linux 10 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-41988 advisory. 1:2.3.21-19.1 - fix CVE-2026-42006: fix imapparser listcountlimit to actually work RHEL-188477 Tenable has extracted the preceding description block directly...

RHEL 10 : dovecot (RHSA-2026:42091)

The remote Redhat Enterprise Linux 10 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:42091 advisory. Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind. It also contains a small POP3 server, and...

ALSA-2026:41988 Important: dovecot security update

Dovecot is an IMAP server for Linux and other UNIX-like systems, written primarily with security in mind. It also contains a small POP3 server, and supports e-mail in either the maildir or mbox format. The SQL drivers and authentication plug-ins are provided as subpackages. Security Fixes: doveco...

dovecot security update

1:2.3.21-19.1 - fix CVE-2026-42006: fix imapparser listcountlimit to actually work RHEL-188477...

CVE-2026-47084

A flaw was found in Cyrus IMAP cyrus-imapd. An authenticated user, without administrative privileges, could bypass Access Control List ACL checks by using the LOCALDELETE command. This allowed them to delete mailboxes for which they did not have the necessary permissions, leading to unauthorized...

CVE-2026-47082

A flaw was found in Cyrus IMAP's cyrus-imapd component. A user with low privileges can exploit a vulnerability in the vacation "fcc" feature. By crafting a specific Sieve script, the user can bypass access control lists and deliver vacation auto-reply messages into any mailbox, leading to...

CVE-2026-47085

A flaw was found in Cyrus IMAP cyrus-imapd. A remote attacker could exploit a vulnerability related to URLAUTH token forgery, caused by a missing mailbox key. This could allow the attacker to gain unauthorized read access to a victim's mailbox. The likelihood of exploitation is low due to the...

CVE-2026-47088

A flaw was found in Cyrus IMAP Internet Message Access Protocol daemon, cyrus-imapd. An authenticated IMAP user could exploit a heap exposure vulnerability during nested Multipurpose Internet Mail Extensions MIME comment parsing. By crafting an email message with a specially formed RFC 822 commen...

EUVD-2026-45011

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is heap exposure in nested MIME comment parsing. An authenticated IMAP user could craft an email message containing an RFC 822 comment ending with a backslash. When parsing the message, the server would read past the...

EUVD-2026-45010

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. URLAUTH does not honor revoked authorizer access. A URLAUTH URL minted while the authorizer had access continued to work after that access was revoked...

EUVD-2026-45007

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. The LOCALDELETE command bypassed ACL checks. An authenticated but non-admin user could invoke the admin-only LOCALDELETE IMAP command and delete mailboxes for which they had no permissions...

EUVD-2026-45004

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is an XAPPLEPUSHSERVICE folder existence oracle and push hijack. An authenticated IMAP user could probe for the existence of arbitrary mailboxes on other users' accounts via the XAPPLEPUSHSERVICE command and then create...

DEBIAN-CVE-2026-47088

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is heap exposure in nested MIME comment parsing. An authenticated IMAP user could craft an email message containing an RFC 822 comment ending with a backslash. When parsing the message, the server would read past the...

DEBIAN-CVE-2026-47087

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. URLAUTH does not honor revoked authorizer access. A URLAUTH URL minted while the authorizer had access continued to work after that access was revoked...

CVE-2026-47085

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. URLAUTH token forgery can occur via a missing mboxkey. If an attacker knew a folder name on the victim's account for which the victim had never issued an auth URL, they could forge a working URLAUTH token by computing an HMAC-SH...

CVE-2026-47087

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. URLAUTH does not honor revoked authorizer access. A URLAUTH URL minted while the authorizer had access continued to work after that access was revoked...