{"schema_version":1,"title":"Open-Xchange Dovecot vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 5 vulnerabilities in Open-Xchange Dovecot: 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-27860, was published on 27 March 2026.","url":"https://junglewise.ai/threats/technologies/open-xchange-dovecot","json_url":"https://junglewise.ai/threats/technologies/open-xchange-dovecot.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/technologies/open-xchange-dovecot","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"technology","thin":true,"counts":{"high":0,"all_time":5,"critical":0,"exploited":0,"last_7_days":0,"last_30_days":0,"last_90_days":0,"last_365_days":5},"latest":[{"cve":"CVE-2026-27860","cvss":3.7,"epss":0.003,"slug":"cve-2026-27860-if-auth-username-chars-is-empty-it-is-possible-to-inject","title":"If auth_username_chars is empty, it is possible to inject arbitrary LDAP filter to Dovecot's LDAP authentication. This…","severity":"low","exploited":false,"published_at":"2026-03-27T09:16:20.383+00:00","url":"https://junglewise.ai/threats/cve-2026-27860-if-auth-username-chars-is-empty-it-is-possible-to-inject"},{"cve":"CVE-2026-27859","cvss":5.3,"epss":0.0038,"slug":"cve-2026-27859-a-mail-message-containing-excessive-amount-of-rfc-2231-mime","title":"A mail message containing excessive amount of RFC 2231 MIME parameters causes LMTP to use too much CPU. A suitably…","severity":"medium","exploited":false,"published_at":"2026-03-27T09:16:20.223+00:00","url":"https://junglewise.ai/threats/cve-2026-27859-a-mail-message-containing-excessive-amount-of-rfc-2231-mime"},{"cve":"CVE-2026-27855","cvss":6.8,"epss":0.0032,"slug":"cve-2026-27855-dovecot-otp-authentication-is-vulnerable-to-replay-attack-under","title":"Dovecot OTP authentication is vulnerable to replay attack under specific conditions. If auth cache is enabled, and…","severity":"medium","exploited":false,"published_at":"2026-03-27T09:16:19.61+00:00","url":"https://junglewise.ai/threats/cve-2026-27855-dovecot-otp-authentication-is-vulnerable-to-replay-attack-under"},{"cve":"CVE-2026-0394","cvss":5.3,"epss":0.0044,"slug":"cve-2026-0394-when-dovecot-has-been-configured-to-use-per-domain-passwd-files","title":"When dovecot has been configured to use per-domain passwd files, and they are placed one path component above /etc, or…","severity":"medium","exploited":false,"published_at":"2026-03-27T09:16:19.283+00:00","url":"https://junglewise.ai/threats/cve-2026-0394-when-dovecot-has-been-configured-to-use-per-domain-passwd-files"},{"cve":"CVE-2025-59028","cvss":5.3,"epss":0.0045,"slug":"cve-2025-59028-when-sending-invalid-base64-sasl-data-login-process-is","title":"When sending invalid base64 SASL data, login process is disconnected from the auth server, causing all active…","severity":"medium","exploited":false,"published_at":"2026-03-27T09:16:18.62+00:00","url":"https://junglewise.ai/threats/cve-2025-59028-when-sending-invalid-base64-sasl-data-login-process-is"}],"weekly":[{"week":"2026-08-17","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-24","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-07","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-28","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-10-05","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-10-12","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-10-19","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-10-26","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-11-02","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-11-09","critical":0,"exploited":0,"vulnerabilities":0}],"related":[{"name":"Open-Xchange Dovecot Pro","slug":"dovecot-pro","vulnerabilities":28,"url":"https://junglewise.ai/threats/technologies/dovecot-pro"},{"name":"Open-Xchange Dovecot CE","slug":"dovecot-ce","vulnerabilities":8,"url":"https://junglewise.ai/threats/technologies/dovecot-ce"}],"technology":{"hub":true,"name":"Open-Xchange Dovecot","slug":"open-xchange-dovecot","vendor":{"hub":true,"name":"Open-Xchange","slug":"open-xchange","url":"https://junglewise.ai/threats/vendors/open-xchange"},"aliases":[],"description":"Open-source mail server software providing IMAP and POP3 access protocols.","url":"https://junglewise.ai/threats/technologies/open-xchange-dovecot"},"most_severe":[{"cve":"CVE-2026-27855","cvss":6.8,"epss":0.0032,"slug":"cve-2026-27855-dovecot-otp-authentication-is-vulnerable-to-replay-attack-under","title":"Dovecot OTP authentication is vulnerable to replay attack under specific conditions. If auth cache is enabled, and…","severity":"medium","exploited":false,"published_at":"2026-03-27T09:16:19.61+00:00","url":"https://junglewise.ai/threats/cve-2026-27855-dovecot-otp-authentication-is-vulnerable-to-replay-attack-under"},{"cve":"CVE-2025-59028","cvss":5.3,"epss":0.0045,"slug":"cve-2025-59028-when-sending-invalid-base64-sasl-data-login-process-is","title":"When sending invalid base64 SASL data, login process is disconnected from the auth server, causing all active…","severity":"medium","exploited":false,"published_at":"2026-03-27T09:16:18.62+00:00","url":"https://junglewise.ai/threats/cve-2025-59028-when-sending-invalid-base64-sasl-data-login-process-is"},{"cve":"CVE-2026-0394","cvss":5.3,"epss":0.0044,"slug":"cve-2026-0394-when-dovecot-has-been-configured-to-use-per-domain-passwd-files","title":"When dovecot has been configured to use per-domain passwd files, and they are placed one path component above /etc, or…","severity":"medium","exploited":false,"published_at":"2026-03-27T09:16:19.283+00:00","url":"https://junglewise.ai/threats/cve-2026-0394-when-dovecot-has-been-configured-to-use-per-domain-passwd-files"},{"cve":"CVE-2026-27859","cvss":5.3,"epss":0.0038,"slug":"cve-2026-27859-a-mail-message-containing-excessive-amount-of-rfc-2231-mime","title":"A mail message containing excessive amount of RFC 2231 MIME parameters causes LMTP to use too much CPU. A suitably…","severity":"medium","exploited":false,"published_at":"2026-03-27T09:16:20.223+00:00","url":"https://junglewise.ai/threats/cve-2026-27859-a-mail-message-containing-excessive-amount-of-rfc-2231-mime"},{"cve":"CVE-2026-27860","cvss":3.7,"epss":0.003,"slug":"cve-2026-27860-if-auth-username-chars-is-empty-it-is-possible-to-inject","title":"If auth_username_chars is empty, it is possible to inject arbitrary LDAP filter to Dovecot's LDAP authentication. This…","severity":"low","exploited":false,"published_at":"2026-03-27T09:16:20.383+00:00","url":"https://junglewise.ai/threats/cve-2026-27860-if-auth-username-chars-is-empty-it-is-possible-to-inject"}],"generated_at":"2026-11-09T03:07:00.176479+00:00"}