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Keycloak CVE-2026-94215

MEDIUM
Missing Authorization (CWE-862)
2026-09-21 redhat
5.5
CVSS 3.1 · Vendor: redhat
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Severity by source

Vendor (redhat) PRIMARY
5.5 MEDIUM
AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:H/A:L
vuln.today AI
6.2 MEDIUM

PR:H (delegated realm admin required) and AC:H (cache-resolution + known cross-realm client ID); C:H because master-realm client secrets are exposed, I:H from config tampering/login redirection.

3.1 AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:L
4.0 AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

Primary rating from Vendor (redhat).

CVSS VectorVendor: redhat

Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
Low

Lifecycle Timeline

2
Analysis Generated
Sep 21, 2026 - 06:46 vuln.today
CVE Published
Sep 21, 2026 - 06:03 cve.org
MEDIUM 5.5

DescriptionCVE.org

A flaw was found in the Admin REST API of Keycloak, an open-source identity and access management solution. The issue occurs because the API uses a per-request in-memory cache to resolve clients by their unique identifier without verifying if the client belongs to the realm specified in the request path. This allows an administrator with limited privileges to read or modify sensitive client configurations in the master realm by accessing them through a realm they control. Successful exploitation could lead to the exposure of client credentials or the redirection of administrative login attempts to malicious sites.

AnalysisAI

Keycloak's Admin REST API allows authenticated administrators with delegated privileges over a realm to read or modify sensitive client configurations in the master realm by abusing a per-request in-memory cache that resolves clients by unique identifier without verifying realm ownership. The flaw affects Red Hat Build of Keycloak and Red Hat Single Sign-On 7, requires the attacker to hold privileged delegated administration rights and to know or reference a target client's unique ID, and is assessed as a moderate-priority authorization issue rather than a high-CVSS critical defect. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Vulnerability AssessmentAI

Exploitation The attacker must hold delegated administrative privileges (e.g. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment This is a genuine but moderate-priority authorization flaw (CWE-862), not an inflated high-CVSS finding. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation No vendor-released patch identified at time of analysis; monitor the Red Hat security advisory at https://access.redhat.com/security/cve/CVE-2026-94215 and Bugzilla https://bugzilla.redhat.com/show_bug.cgi?id=2537312 for patched versions of Red Hat Build of Keycloak and Red Hat Single Sign-On 7. … Detailed patch versions, workarounds, and compensating controls in full report.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-94215 vulnerability details – vuln.today

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