CVE-2026-107121 Keycloak-services: keycloak-services: smtp starttls plaintext credential and message downgrade

A flaw was found in the SMTP email configuration handling of the keycloak-services component. When the STARTTLS option is enabled, Keycloak fails to strictly enforce an encrypted connection, allowing it to fall back to unencrypted communication if the encryption request is tampered with. An...

CVE-2026-107121 Keycloak-services: keycloak-services: smtp starttls plaintext credential and message downgrade

A flaw was found in the SMTP email configuration handling of the keycloak-services component. When the STARTTLS option is enabled, Keycloak fails to strictly enforce an encrypted connection, allowing it to fall back to unencrypted communication if the encryption request is tampered with. An...

CVE-2026-107121

A flaw exists in the SMTP email configuration handling of the keycloak-services component. When the STARTTLS option is enabled, the system fails to strictly enforce encrypted connections, allowing a downgrade to unencrypted communication if the encryption request is tampered with. An attacker cap...