CVE-2026-92857

Keycloak provides a Dynamic Client Registration feature that allows users with specific tokens to register their own applications. A flaw in how Keycloak validates these registration requests allows an attacker to create a malicious application that forges identity information. By mapping their own user profile details to protected fields like the user ID (sub) or intended audience (aud), an attacker can generate signed security tokens that make them appear to be a different user. This could allow an attacker to impersonate other users or gain unauthorized access to services that rely on these tokens for identity verification.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-92857
https://bugzilla.redhat.com/show_bug.cgi?id=2535817

Configurations

No configuration.

History

05 Nov 2026, 18:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-11-05 18:17

Updated : 2026-11-05 18:17

NVD link : CVE-2026-92857

Mitre link : CVE-2026-92857

CVE.ORG link : CVE-2026-92857

JSON object : View

Products Affected

No product.

CWE

CWE-20

Improper Input Validation

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