{"cve":"CVE-2026-15572","nvd":{"published":"2026-08-05T16:16:50.903","modified":"2026-08-10T19:23:37.147","status":"Analyzed","description":"A flaw was found in Keycloak's Dynamic Client Registration (DCR) security policy management. The \"Allowed Protocol Mapper Types\" policy, which restricts which types of data mappers a client can use, fails to re-validate the mapper type during a client update if the mapper's configuration remains unchanged. An attacker with client registration privileges can exploit this by first registering an allowed mapper type with a malicious configuration and then swapping it for a restricted, high-privilege mapper type (such as one that hardcodes administrative roles). This allows the attacker to gain full administrative access to the Keycloak realm.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-843"],"references":["https://access.redhat.com/errata/RHSA-2026:50846","https://access.redhat.com/errata/RHSA-2026:50847","https://access.redhat.com/errata/RHSA-2026:50848","https://access.redhat.com/errata/RHSA-2026:50849","https://access.redhat.com/security/cve/CVE-2026-15572"],"products":["redhat:build_of_keycloak"],"source":"nvd","synced_at":"2026-10-19T22:47:10.050265369+00:00"},"epss":{"cve":"CVE-2026-15572","score":0.00652,"percentile":0.51257,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}