What’s Vulnerable › Vulnerabilities

CVE-2026-89298: Keycloak-services: keycloak-services: confidential client secret disclosed to view-clients role via client registration get

• Severity: medium (CVSS 4.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-11 · updated 2026-09-16
• Weakness: CWE-200

Description

A flaw was found in the Dynamic Client Registration service of Keycloak, an open-source identity and access management solution. The issue occurs when a user with the view-clients role accesses the client registration endpoint to retrieve client details. Due to a failure to mask sensitive information, the service returns the client's confidential secret in cleartext. This could allow a read-only administrator to obtain full access to the affected client's account and potentially escalate their privileges within the realm.

Affected products

• Red Hat build of Keycloak 26.4: all versions
• Red Hat Single Sign-On 7: all versions

References

• https://access.redhat.com/security/cve/CVE-2026-89298
• https://bugzilla.redhat.com/show_bug.cgi?id=2531871

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