CVE-2025-8419

Published: Aug 6, 2025

Modified: Jan 8, 2026

PUBLISHED

CVSS v3.1

5.3

MEDIUM

Description

A vulnerability was found in Keycloak-services. Special characters used during e-mail registration may perform SMTP Injection and unexpectedly send short unwanted e-mails. The email is limited to 64 characters (limited local part of the email), so the attack is limited to very shorts emails (subject and little data, the example is 60 chars). This flaw's only direct consequence is an unsolicited email being sent from the Keycloak server. However, this action could be a precursor for more sophisticated attacks.

Vendor	Product	Versions
Keycloak	keycloak	affected `0 - < 26.3.3`
Red Hat	Red Hat build of Keycloak 26.0	All versions
Red Hat	Red Hat build of Keycloak 26.0	unaffected `26.0.15-1 - < *`
Red Hat	Red Hat build of Keycloak 26.0	unaffected `26.0-18 - < *`
Red Hat	Red Hat build of Keycloak 26.0	unaffected `26.0-19 - < *`
Red Hat	Red Hat build of Keycloak 26.2	All versions
Red Hat	Red Hat build of Keycloak 26.2	unaffected `26.2.8-1 - < *`
Red Hat	Red Hat build of Keycloak 26.2	unaffected `26.2-8 - < *`
Red Hat	Red Hat build of Keycloak 26.2	unaffected `26.2-8 - < *`