CVE-2026-16100

Description

A flaw was found in the user-event metrics recording of Keycloak. When metrics are enabled, the system records raw error messages from failed account operations as Prometheus metric labels. Because these error messages can include user-supplied input like nonexistent client IDs, an authenticated user can create a massive number of unique metric entries, eventually exhausting system memory and causing the service to crash or become unavailable.

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Produits concernés

• Red Hat build of Keycloak 26.6
• Red Hat build of Keycloak 26.6.5
• Red Hat Data Grid 8
• Red Hat JBoss Enterprise Application Platform Expansion Pack
• Red Hat Single Sign-On 7
• Redhat build of keycloak

Scores CVSS

Faiblesses (CWE)

• CWE-770

Références

• https://access.redhat.com/errata/RHSA-2026:50848 Vendor Advisory
• https://access.redhat.com/errata/RHSA-2026:50849 Vendor Advisory
• https://access.redhat.com/security/cve/CVE-2026-16100 Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2501730 Issue TrackingVendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories