CVE-2026-107121
MEDIUM
NVD
CVSS Score
6.5
Severity
MEDIUM
Published
Oct 07, 2026
Vendor
unknown
Description
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 attacker who can intercept network traffic can exploit this to capture sensitive email credentials and message content in plain text.