Medium severity · published Jun 11, 2026
CVE-2026-11986
Keycloak-rest-admin-ui-ext: authorization bypass vulnerability in the admin-ui-ext bulk role-mapping-delete endpoints of keycloak
4.9
CVSS
0.3%
EPSS
No
On KEV
Description
A flaw was found in the admin-ui-ext component of Keycloak, which provides extended administrative user interface capabilities. The issue occurs because certain bulk role-removal endpoints fail to perform granular permission checks when deleting role mappings. This allows a delegated administrator with limited permissions to remove highly privileged roles from other users or groups, potentially disrupting administrative access control.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat build of Keycloak 26.6 · Red Hat
All versions, or not specified · source: vendor
BO
Build OF Keycloak · Redhat
26.6 before 26.6.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-11986
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-11986
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:50848
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:50849
Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-11986
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2487906
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