{"affected":[{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"keycloak-services","product":"Red Hat Build of Keycloak","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"affected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"rhbk/keycloak-rhel9","product":"Red Hat Build of Keycloak","source":"CNA: redhat","vendor":"Red Hat","versions":[]},{"defaultStatus":"unaffected","ecosystem":"https://access.redhat.com/downloads/content/package-browser/","packageName":"keycloak-services","product":"Red Hat Single Sign-On 7","source":"CNA: redhat","vendor":"Red Hat","versions":[]}],"cveId":"CVE-2026-109081","cwes":["CWE-862"],"description":"A flaw was found in Keycloak. The Dynamic Client Registration (DCR) endpoint does not properly validate authorization when processing the deprecated defaultRoles field. An authenticated attacker with client creation privileges or an Initial Access Token (IAT) can inject excessive roles into the realm's default roles configuration. This causes clients across the realm to generate bloated access tokens, resulting in performance and memory degradation that can lead to a Denial of Service (DoS).","epss":null,"exploits":[],"kev":null,"metrics":[{"score":6.8,"severity":"medium","source":"CNA: redhat","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H","version":"3.1"}],"modifiedAt":1793944649220,"publishedAt":1793944649220,"references":[{"source":"CNA: redhat","tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-109081"}],"remediation":[{"kind":"workaround","source":"CNA: redhat","text":"Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}],"revision":"bda0c1932aafcd6b37fabcdf6e391464f05a751ff9dc697939c114aa527ddf2b","sources":[{"modifiedAt":1793944649220,"name":"CNA: redhat","retrievedAt":1793945304658,"url":"https://www.cve.org/CVERecord?id=CVE-2026-109081"}],"ssvc":null,"status":"published","title":"Keycloak-services: keycloak-services: injection of roles into realm default-roles via dcr endpoint","updatedAt":1793945304658}