CVE-2026-16102
published 2026-08-05CVE-2026-16102: A flaw was found in the Dynamic Client Registration (DCR) component of Keycloak, an identity and access management solution. The default DCR policy fails to…
PriorityP356high8.1CVSS 3.1
AVNACLPRLUINSUCHIHAN
EPSS
0.46%
38.8th percentile
A flaw was found in the Dynamic Client Registration (DCR) component of Keycloak, an identity and access management solution. The default DCR policy fails to properly validate the claim path for User Property mappers, allowing them to write values to sensitive internal claim locations. An attacker with a standard user account and a limited Initial Access Token can exploit this to forge administrative roles in their access token. This allows the attacker to take over other clients, steal confidential secrets, and potentially gain full administrative control over the realm.
Affected
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| redhat | build_of_keycloak | >= 26.4 < 26.4.14 | 26.4.14 |
| redhat | build_of_keycloak | >= 26.6 < 26.6.5 | 26.6.5 |
| redhat | data_grid | — | — |
| redhat | single_sign-on | — | — |
| rhbk-keycloak-rhel9 | rhbk-keycloak-rhel9 | — | — |
| rhbk-openshift-rhel9 | rhbk-openshift-rhel9 | — | — |
| rhbk | keycloak-operator-bundle_26.4.14-1 | — | — |
| rhbk | keycloak-operator-bundle_26.6.5-1 | — | — |
| rhbk | keycloak-rhel9-operator_26.4-22 | — | — |
| rhbk | keycloak-rhel9-operator_26.6-11 | — | — |
| rhbk | keycloak-rhel9_26.4-22 | — | — |
| rhbk | keycloak-rhel9_26.6-11 | — | — |
CVSS provenance
nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
vendor_redhat8.1HIGH
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Red Hat
keycloak-services: keycloak-services: Default DCR policy allows role forgery via User Property mappers
vendor_redhat·2026-08-05·CVSS 8.1
CVE-2026-16102 [HIGH] keycloak-services: keycloak-services: Default DCR policy allows role forgery via User Property mappers
keycloak-services: keycloak-services: Default DCR policy allows role forgery via User Property mappers
A flaw was found in the Dynamic Client Registration (DCR) component of Keycloak, an identity and access management solution. The default DCR policy fails to properly validate the claim path for User Property mappers, allowing them to write values to sensitive internal claim locations. An attacker with a standard user account and a limited Initial Access Token can exploit this to forge administrative roles in their access token. This allows the attacker to take over other clients, steal confidential secrets, and potentially gain full administrative control over the realm.
Statement: The Red Hat Product Security team has assessed the severity of this vulnerability as Important, given that
GHSA
A flaw was found in the Dynamic Client Registration (DCR) component of Keycloak, an identity and access management solution.
ghsa_unreviewed·2026-08-05
CVE-2026-16102 [HIGH] CWE-284 A flaw was found in the Dynamic Client Registration (DCR) component of Keycloak, an identity and access management solution.
A flaw was found in the Dynamic Client Registration (DCR) component of Keycloak, an identity and access management solution. The default DCR policy fails to properly validate the claim path for User Property mappers, allowing them to write values to sensitive internal claim locations. An attacker with a standard user account and a limited Initial Access Token can exploit this to forge administrative roles in their access token. This allows the attacker to take over other clients, steal confidential secrets, and potentially gain full administrative control over the realm.
No detection rules found.
No public exploits indexed.
2026-08-05
Published