Dovecot
Source repositories
CVEs (81)
| CVE | Vendor / Product | Sev | Risk | CVSS | EPSS | KEV | Published | Description |
|---|---|---|---|---|---|---|---|---|
| CVE-2021-33515 | Med | 0.31 | 4.8 | 0.03 | Jun 28, 2021 | The submission service in Dovecot before 2.3.15 allows STARTTLS command injection in lib-smtp. Sensitive information can be redirected to an attacker-controlled address. | ||
| CVE-2026-42008 | Med | 0.28 | 4.3 | 0.00 | Aug 28, 2026 | Forwarding information received from a host listed as a trusted proxy is not kept separate from Dovecot's own authentication fields, so a value sent by that host can be injected as an internal authentication field. Any host permitted to act as a trusted proxy can authenticate as… | ||
| CVE-2026-42006 | Med | 0.28 | 4.3 | 0.01 | May 12, 2026 | 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… | ||
| CVE-2020-28200 | Med | 0.28 | 4.3 | 0.02 | Jun 28, 2021 | The Sieve engine in Dovecot before 2.3.15 allows Uncontrolled Resource Consumption, as demonstrated by a situation with a complex regular expression for the regex extension. | ||
| CVE-2026-27859 | Med | 0.27 | 5.3 | 0.00 | Mar 27, 2026 | 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,… | ||
| CVE-2026-0394 | Med | 0.27 | 5.3 | 0.00 | Mar 27, 2026 | 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 allowed characters, path traversal can happen if the domain component is directory partial. This allows inadvertently reading… | ||
| CVE-2025-59028 | Med | 0.27 | 5.3 | 0.00 | Mar 27, 2026 | When sending invalid base64 SASL data, login process is disconnected from the auth server, causing all active authentication sessions to fail. Invalid BASE64 data can be used to DoS a vulnerable server to break concurrent logins. Install fixed version or disable concurrency in… | ||
| CVE-2026-27857 | Med | 0.21 | 4.3 | 0.01 | Mar 27, 2026 | Sending "NOOP (((...)))" command with 4000 parenthesis open+close results in ~1MB extra memory usage. Longer commands will result in client disconnection. This 1 MB can be left allocated for longer time periods by not sending the command ending LF. So attacker could connect… | ||
| CVE-2025-59031 | Med | 0.21 | 4.3 | 0.00 | Mar 27, 2026 | Dovecot has provided a script to use for attachment to text conversion. This script unsafely handles zip-style attachments. Attacker can use specially crafted OOXML documents to cause unintended files on the system to be indexed and subsequently ending up in FTS indexes. Do not… | ||
| CVE-2016-4983 | Low | 0.21 | 3.3 | 0.00 | Nov 5, 2019 | A postinstall script in the dovecot rpm allows local users to read the contents of newly created SSL/TLS key files. | ||
| CVE-2026-40020 | Low | 0.20 | 3.1 | 0.00 | May 12, 2026 | Attacker can use the IMAP SETACL command to inject the anyone permission to user's dovecot-acl file even if imap_acl_allow_anyone=no. This causes folders to be spammed to all users. The impact is limited to being able to spam folders to other users, no unexpected access is… | ||
| CVE-2026-27860 | Low | 0.17 | 3.7 | 0.00 | Mar 27, 2026 | If auth_username_chars is empty, it is possible to inject arbitrary LDAP filter to Dovecot's LDAP authentication. This leads to potentially bypassing restrictions and allows probing of LDAP structure. Do not clear out auth_username_chars, or install fixed version. No publicly… | ||
| CVE-2008-1218 | 0.04 | — | 0.07 | Mar 10, 2008 | Argument injection vulnerability in Dovecot 1.0.x before 1.0.13, and 1.1.x before 1.1.rc3, when using blocking passdbs, allows remote attackers to bypass the password check via a password containing TAB characters, which are treated as argument delimiters that enable the… | |||
| CVE-2008-4907 | 0.03 | — | 0.06 | Nov 4, 2008 | The message parsing feature in Dovecot 1.1.4 and 1.1.5, when using the FETCH ENVELOPE command in the IMAP client, allows remote attackers to cause a denial of service (persistent crash) via an email with a malformed From address, which triggers an assertion error, aka "invalid… | |||
| CVE-2017-2669 | Low | 0.00 | 3.7 | 0.04 | Jun 21, 2018 | Dovecot before version 2.2.29 is vulnerable to a denial of service. When 'dict' passdb and userdb were used for user authentication, the username sent by the IMAP/POP3 client was sent through var_expand() to perform %variable expansion. Sending specially crafted %variable fields… | ||
| CVE-2017-15132 | Hig | 0.00 | 7.5 | 0.03 | Jan 25, 2018 | A flaw was found in dovecot 2.0 up to 2.2.33 and 2.3.0. An abort of SASL authentication results in a memory leak in dovecot's auth client used by login processes. The leak has impact in high performance configuration where same login processes are reused and can cause the… | ||
| CVE-2013-2111 | 0.00 | — | 0.02 | May 27, 2014 | 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 APPEND parameters. | |||
| CVE-2014-3430 | 0.00 | — | 0.03 | May 14, 2014 | 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 attackers to cause a denial of service (resource consumption) via an incomplete SSL/TLS handshake for an IMAP/POP3 connection. | |||
| CVE-2013-6171 | 0.00 | — | 0.01 | Dec 9, 2013 | checkpassword-reply in Dovecot before 2.2.7 performs setuid operations to a user who is authenticating, which allows local users to bypass authentication and access virtual email accounts by attaching to the process and using a restricted file descriptor to modify account… | |||
| CVE-2011-4318 | 0.00 | — | 0.01 | Mar 7, 2013 | 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 hostname matches a domain name in the subject's Common Name (CN) of the X.509 certificate, which allows man-in-the-middle attackers… |
- risk 0.31cvss 4.8epss 0.03
The submission service in Dovecot before 2.3.15 allows STARTTLS command injection in lib-smtp. Sensitive information can be redirected to an attacker-controlled address.
- risk 0.28cvss 4.3epss 0.00
Forwarding information received from a host listed as a trusted proxy is not kept separate from Dovecot's own authentication fields, so a value sent by that host can be injected as an internal authentication field. Any host permitted to act as a trusted proxy can authenticate as…
- risk 0.28cvss 4.3epss 0.01
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…
- risk 0.28cvss 4.3epss 0.02
The Sieve engine in Dovecot before 2.3.15 allows Uncontrolled Resource Consumption, as demonstrated by a situation with a complex regular expression for the regex extension.
- risk 0.27cvss 5.3epss 0.00
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,…
- risk 0.27cvss 5.3epss 0.00
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 allowed characters, path traversal can happen if the domain component is directory partial. This allows inadvertently reading…
- risk 0.27cvss 5.3epss 0.00
When sending invalid base64 SASL data, login process is disconnected from the auth server, causing all active authentication sessions to fail. Invalid BASE64 data can be used to DoS a vulnerable server to break concurrent logins. Install fixed version or disable concurrency in…
- risk 0.21cvss 4.3epss 0.01
Sending "NOOP (((...)))" command with 4000 parenthesis open+close results in ~1MB extra memory usage. Longer commands will result in client disconnection. This 1 MB can be left allocated for longer time periods by not sending the command ending LF. So attacker could connect…
- risk 0.21cvss 4.3epss 0.00
Dovecot has provided a script to use for attachment to text conversion. This script unsafely handles zip-style attachments. Attacker can use specially crafted OOXML documents to cause unintended files on the system to be indexed and subsequently ending up in FTS indexes. Do not…
- risk 0.21cvss 3.3epss 0.00
A postinstall script in the dovecot rpm allows local users to read the contents of newly created SSL/TLS key files.
- risk 0.20cvss 3.1epss 0.00
Attacker can use the IMAP SETACL command to inject the anyone permission to user's dovecot-acl file even if imap_acl_allow_anyone=no. This causes folders to be spammed to all users. The impact is limited to being able to spam folders to other users, no unexpected access is…
- risk 0.17cvss 3.7epss 0.00
If auth_username_chars is empty, it is possible to inject arbitrary LDAP filter to Dovecot's LDAP authentication. This leads to potentially bypassing restrictions and allows probing of LDAP structure. Do not clear out auth_username_chars, or install fixed version. No publicly…
- CVE-2008-1218Mar 10, 2008risk 0.04cvss —epss 0.07
Argument injection vulnerability in Dovecot 1.0.x before 1.0.13, and 1.1.x before 1.1.rc3, when using blocking passdbs, allows remote attackers to bypass the password check via a password containing TAB characters, which are treated as argument delimiters that enable the…
- CVE-2008-4907Nov 4, 2008risk 0.03cvss —epss 0.06
The message parsing feature in Dovecot 1.1.4 and 1.1.5, when using the FETCH ENVELOPE command in the IMAP client, allows remote attackers to cause a denial of service (persistent crash) via an email with a malformed From address, which triggers an assertion error, aka "invalid…
- risk 0.00cvss 3.7epss 0.04
Dovecot before version 2.2.29 is vulnerable to a denial of service. When 'dict' passdb and userdb were used for user authentication, the username sent by the IMAP/POP3 client was sent through var_expand() to perform %variable expansion. Sending specially crafted %variable fields…
- risk 0.00cvss 7.5epss 0.03
A flaw was found in dovecot 2.0 up to 2.2.33 and 2.3.0. An abort of SASL authentication results in a memory leak in dovecot's auth client used by login processes. The leak has impact in high performance configuration where same login processes are reused and can cause the…
- CVE-2013-2111May 27, 2014risk 0.00cvss —epss 0.02
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 APPEND parameters.
- CVE-2014-3430May 14, 2014risk 0.00cvss —epss 0.03
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 attackers to cause a denial of service (resource consumption) via an incomplete SSL/TLS handshake for an IMAP/POP3 connection.
- CVE-2013-6171Dec 9, 2013risk 0.00cvss —epss 0.01
checkpassword-reply in Dovecot before 2.2.7 performs setuid operations to a user who is authenticating, which allows local users to bypass authentication and access virtual email accounts by attaching to the process and using a restricted file descriptor to modify account…
- CVE-2011-4318Mar 7, 2013risk 0.00cvss —epss 0.01
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 hostname matches a domain name in the subject's Common Name (CN) of the X.509 certificate, which allows man-in-the-middle attackers…
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