{"id":"CVE-2026-15572","aliases":["BIT-keycloak-2026-15572","EUVD-2026-53398","GHSA-cj2r-7gqh-wx4f"],"status":"published","title":"Keycloak-services: keycloak-services: dcr protocol mapper type-swap policy bypass allows privilege escalation","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.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00652,"percentile":0.51759,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-843"],"published":"2026-08-05T15:09:23Z","modified":"2026-09-08T08:48:06Z","fixes":[{"ecosystem":"Bitnami","package":"keycloak","fixed_in":["26.4.14","26.6.5"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"keycloak","ranges":[{"type":"SEMVER","events":[{"introduced":"26.4.0"},{"fixed":"26.4.14"},{"introduced":"26.6.0"},{"fixed":"26.6.5"}]}]}],"products":[{"vendor":"red hat","product":"red hat build of keycloak 26.4"},{"vendor":"red hat","product":"red hat build of keycloak 26.4.14"},{"vendor":"red hat","product":"red hat build of keycloak 26.6"},{"vendor":"red hat","product":"red hat build of keycloak 26.6.5"},{"vendor":"redhat","product":"build_of_keycloak"}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:50846","tags":["vendor-advisory","x_refsource_REDHAT","Vendor Advisory","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:50847","tags":["vendor-advisory","x_refsource_REDHAT","Vendor Advisory","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:50848","tags":["vendor-advisory","x_refsource_REDHAT","Vendor Advisory","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:50849","tags":["vendor-advisory","x_refsource_REDHAT","Vendor Advisory","advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-15572","tags":["vdb-entry","x_refsource_REDHAT","Vendor Advisory","advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2499592","tags":["issue-tracking","x_refsource_REDHAT","Issue Tracking","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-15572","tags":["web"]},{"url":"https://github.com/advisories/GHSA-cj2r-7gqh-wx4f"}],"sources":{"cve":[{"id":"CVE-2026-15572","title":"Keycloak-services: keycloak-services: dcr protocol mapper type-swap policy bypass allows privilege escalation","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.","status":"published","published":"2026-08-05T15:09:23.102Z","modified":"2026-08-05T18:42:39.517Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T13:47:51.033687Z"}],"euvd":[{"id":"EUVD-2026-53398","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.","status":"published","published":"2026-08-05T15:09:23Z","modified":"2026-08-05T18:42:39Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T18:02:09.520152Z"}],"ghsa":[{"id":"GHSA-cj2r-7gqh-wx4f","title":"A flaw was found in Keycloak's Dynamic Client Registration (DCR) security policy management. The ...","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.","status":"published","published":"2026-08-05T18:31:35Z","modified":"2026-08-05T18:31:35Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T15:10:07.328501Z"}],"nvd":[{"id":"CVE-2026-15572","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.","status":"published","published":"2026-08-05T16:16:50.903Z","modified":"2026-08-10T19:23:37.147Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T14:12:35.031043Z"}],"osv":[{"id":"BIT-keycloak-2026-15572","title":"Keycloak-services: keycloak-services: dcr protocol mapper type-swap policy bypass allows privilege escalation","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.","status":"published","published":"2026-08-25T11:41:38.475Z","modified":"2026-09-08T08:48:06.756013419Z","updated_at":"2026-11-02T15:28:32.162822Z"}]}}