Vulnerability index

Browse CVEs

36 matching
Filters 1 Clear all
Severity

Filters apply as you choose them.

Dovecot MEDIUM 6.5
CVE-2026-40016

Attacker can upload a malicious Sieve script over ManageSieve service (or locally) to bypass configured CPU time limits for Sieve up to 130 times of …

Fix: 2.4.4 / 3.1.5+
Fix from $1,600 2026-05-12
Dovecot MEDIUM 5.3
CVE-2026-33603

Attacker can use a specially crafted base64 exchange between Dovecot and Client to fake SCRAM TLS channel binding. This requires that the attacker is…

Fix: 2.4.4 / 3.1.5+
Fix from $1,600 2026-05-12
Dovecot CRITICAL 9.1
CVE-2026-27851

When safe filter is used with variable expansion, all following pipelines on the same string are incorrectly interpreted as safe too, enabling unsafe…

Fix: 2.4.4 / 3.1.5+
Fix from $2,300 2026-05-12
Dovecot HIGH 7.5
CVE-2026-27858

Attacker can send a specifically crafted message before authentication that causes managesieve to allocate large amount of memory. Attacker can for…

Fix: 2.3.22.1 / 2.4.3+
Fix from $1,950 2026-03-27
Dovecot MEDIUM 5.3
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…

Fix: 2.4.3 / 3.0.5+
Fix from $1,600 2026-03-27
Dovecot MEDIUM 5.3
CVE-2026-27860

If auth_username_chars is empty, it is possible to inject arbitrary LDAP filter to Dovecot's LDAP authentication. This leads to potentially bypassing…

Fix: 2.4.3 / 3.1.4+
Fix from $1,600 2026-03-27
Dovecot HIGH 8.2
CVE-2026-24031

Dovecot SQL based authentication can be bypassed when auth_username_chars is cleared by admin. This vulnerability allows bypassing authentication for…

Fix: 2.4.3 / 3.1.4+
Fix from $1,950 2026-03-27
Dovecot HIGH 7.5
CVE-2026-27857

Sending "NOOP (((...)))" command with 4000 parenthesis open+close results in ~1MB extra memory usage. Longer commands will result in client disconnec…

Fix: 2.3.22.1 / 2.4.3+
Fix from $1,950 2026-03-27
Dovecot MEDIUM 5.9
CVE-2026-27855

Dovecot OTP authentication is vulnerable to replay attack under specific conditions. If auth cache is enabled, and username is altered in passdb, the…

Fix: 2.4.3+
Fix from $1,600 2026-03-27
Dovecot MEDIUM 5.9
CVE-2026-27856

Doveadm credentials are verified using direct comparison which is susceptible to timing oracle attack. An attacker can use this to determine the conf…

Fix: 2.3.22.1 / 2.4.3+
Fix from $1,600 2026-03-27
Dovecot MEDIUM 5.3
CVE-2026-0394

When dovecot has been configured to use per-domain passwd files, and they are placed one path component above /etc, or slash has been added to allowe…

Fix: 2.4.0 / 3.1.0+
Fix from $1,600 2026-03-27
Dovecot HIGH 7.5
CVE-2025-59028

When sending invalid base64 SASL data, login process is disconnected from the auth server, causing all active authentication sessions to fail. Invali…

Fix: 2.4.3 / 3.1.2+
Fix from $1,950 2026-03-27
Dovecot HIGH 7.5
CVE-2025-59032

ManageSieve AUTHENTICATE command crashes when using literal as SASL initial response. This can be used to crash ManageSieve service repeatedly, makin…

Fix: 2.4.3 / 3.1.3+
Fix from $1,950 2026-03-27
Dovecot MEDIUM 5.3
CVE-2020-10967EPSS 8%

In Dovecot before 2.3.10.1, remote unauthenticated attackers can crash the lmtp or submission process by sending mail with an empty localpart.

Fix: 2.3.10.1+
Fix from $1,600 2020-05-18
Dovecot HIGH 7.5
CVE-2020-10957EPSS 7%

In Dovecot before 2.3.10.1, unauthenticated sending of malformed parameters to a NOOP command causes a NULL Pointer Dereference and crash in submissi…

Fix: 2.3.10.1+
Fix from $1,950 2020-05-18
Dovecot MEDIUM 5.3
CVE-2020-10958EPSS 6%

In Dovecot before 2.3.10.1, a crafted SMTP/LMTP message triggers an unauthenticated use-after-free bug in submission-login, submission, or lmtp, and …

Fix: 2.3.10.1+
Fix from $1,600 2020-05-18
Dovecot HIGH 7.5
CVE-2019-10691

The JSON encoder in Dovecot before 2.3.5.2 allows attackers to repeatedly crash the authentication service by attempting to authenticate with an inva…

Fix: 2.3.5.2+
Fix from $1,950 2019-04-24
Dovecot MEDIUM 5.9
CVE-2016-8652EPSS 48%

The auth component in Dovecot before 2.2.27, when auth-policy is configured, allows a remote attackers to cause a denial of service (crash) by aborti…

Fix: after 2.2.27
Fix from $1,600 2017-02-17
Dovecot MEDIUM 5.0
CVE-2013-2111

The IMAP functionality in Dovecot before 2.2.2 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via invalid A…

Fix: after 2.2.1
Fix from $1,600 2014-05-27
Dovecot MEDIUM 5.0
CVE-2014-3430

Dovecot 1.1 before 2.2.13 and dovecot-ee before 2.1.7.7 and 2.2.x before 2.2.12.12 does not properly close old connections, which allows remote attac…

Patch available
Fix from $1,600 2014-05-14
Dovecot MEDIUM 5.8
CVE-2013-6171

checkpassword-reply in Dovecot before 2.2.7 performs setuid operations to a user who is authenticating, which allows local users to bypass authentica…

Fix: after 2.2.6
Fix from $1,600 2013-12-09
Dovecot MEDIUM 5.8
CVE-2011-4318

Dovecot 2.0.x before 2.0.16, when ssl or starttls is enabled and hostname is used to define the proxy destination, does not verify that the server ho…

Mitigation only
Fix from $1,600 2013-03-07
Dovecot MEDIUM 6.5
CVE-2011-2166

script-login in Dovecot 2.0.x before 2.0.13 does not follow the user and group configuration settings, which might allow remote authenticated users t…

Patch available
Fix from $1,600 2011-05-24
Dovecot MEDIUM 6.5
CVE-2011-2167

script-login in Dovecot 2.0.x before 2.0.13 does not follow the chroot configuration setting, which might allow remote authenticated users to conduct…

Patch available
Fix from $1,600 2011-05-24
Dovecot MEDIUM 5.0
CVE-2011-1929

lib-mail/message-header-parser.c in Dovecot 1.2.x before 1.2.17 and 2.0.x before 2.0.13 does not properly handle '\0' characters in header names, whi…

Patch available
Fix from $1,600 2011-05-24
Dovecot MEDIUM 5.5
CVE-2010-3706

plugins/acl/acl-backend-vfile.c in Dovecot 1.2.x before 1.2.15 and 2.0.x before 2.0.5 interprets an ACL entry as a directive to add to the permission…

Mitigation only
Fix from $1,600 2010-10-06
Dovecot MEDIUM 5.5
CVE-2010-3707

plugins/acl/acl-backend-vfile.c in Dovecot 1.2.x before 1.2.15 and 2.0.x before 2.0.5 interprets an ACL entry as a directive to add to the permission…

Mitigation only
Fix from $1,600 2010-10-06
Dovecot MEDIUM 6.4
CVE-2010-3304

The ACL plugin in Dovecot 1.2.x before 1.2.13 propagates INBOX ACLs to newly created mailboxes in certain configurations, which might allow remote at…

Patch available
Fix from $1,600 2010-09-24
Dovecot MEDIUM 5.0
CVE-2010-0745

Unspecified vulnerability in Dovecot 1.2.x before 1.2.11 allows remote attackers to cause a denial of service (CPU consumption) via long headers in a…

Patch available
Fix from $1,600 2010-05-20
Dovecot MEDIUM 5.5
CVE-2009-3897

Dovecot 1.2.x before 1.2.8 sets 0777 permissions during creation of certain directories at installation time, which allows local users to access arbi…

Fix: 1.2.8+
Fix from $1,600 2009-11-24