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5.3 Medium

CVE-2025-8419 A vulnerability was found in Keycloak-services

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.

Affected products and versions

Product Affected versions Fixed in
keycloak 26.3 earliest → < 26.3.3 26.3.3
Red Hat build of Keycloak 26.0 26.0 earliest → < 26.0-19 26.0-19
Red Hat build of Keycloak 26.2 26.2 earliest → < 26.2-8 26.2-8
Red Hat Build of Keycloak Versions not published

References

Timeline

  1. Published
  2. Last modified

Other CVEs of keycloak

The 15 CVEs of keycloak →
CVE-2026-90997 A flaw was found in Keycloak 7.4 High CVE-2026-1609 A flaw was found in Keycloak 8.1 High CVE-2025-12150 A flaw was found in Keycloak’s WebAuthn registration component 3.1 Low CVE-2025-13467 A flaw was found in the Keycloak LDAP User Federation provider 5.5 Medium
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