Medium severity · published Sep 25, 2026
CVE-2026-96448
Keycloak-services: keycloak-services: fgap v2 composite-blind role mapping allows privilege escalation
6.6
CVSS
0.2%
EPSS
No
On KEV
Description
A flaw was found in the Fine-Grained Admin Permissions (FGAP v2) feature of Keycloak, an identity and access management solution. The issue occurs when the system checks if a delegated administrator has permission to assign a specific role to a user. Because the check does not look inside composite roles to see what other permissions they contain, an administrator with limited rights can assign a role that secretly includes full administrative control. This allows the attacker to gain complete management access over the entire realm.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% 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 · Red Hat
All versions, or not specified · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-96448
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-96448
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-96448
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2539291
More from Red Hat Build of Keycloak
9.8
CVE-2026-42581
Netty: HTTP/1.0 TE+CL Coexistence Bypasses Smuggling Sanitization
9.8
CVE-2026-33228
flatted: Prototype Pollution via parse()
9.1
CVE-2026-42584
Netty: HttpClientCodec response desynchronization
9.1
CVE-2026-42579
Netty: DNS Codec Input Validation Bypass in Netty (Encoder + Decoder)
8.2
CVE-2026-93569
Io.netty/netty-codec-http2: http/1 absolute-form host mismatch is translated to http/2 :authority, overriding the request-target authority
