CVE-2026-16102Keycloak-services: keycloak-services: default dcr policy allows role forgery via user property mappers
Updated under an hour ago ()
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It affects Red Hat build of Keycloak 26.4 and 7 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- Weakness (CWE)
- CWE-551, CWE-284
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Modified
- Record last updated
- Aug 31, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat build of Keycloak 26.4 redhat:build_keycloak | from 26.4.14-1 not affected | CNA record |
Red Hat Red Hat Data Grid 8 redhat:jboss_data_grid | 8 | CNA record |
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack redhat:jbosseapxp | Versions not stated | CNA record |
Red Hat Red Hat Single Sign-On 7 redhat:red_hat_single_sign_on | 7 | CNA record |
redhat build_of_keycloak redhat:build_of_keycloak | from 26.4 before 26.4.14; from 26.6 before 26.6.5 | NVD |
redhat data_grid redhat:data_grid | 8.0 | NVD |
redhat jboss_enterprise_application_platform_expansion_pack redhat:jboss_enterprise_application_platform_expansion_pack | all versions | NVD |
redhat single_sign-on redhat:single_sign-on | 7.0 | NVD |
References
- https://access.redhat.com/errata/RHSA-2026:50846vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:50847vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:50848vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:50849vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-16102vdb-entry, x-refsource-redhat, vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2501735issue-tracking, x-refsource-redhat
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.