CVE-2026-105306

A flaw was found in the Dynamic Client Registration flow of the Keycloak identity and access management server. The issue occurs because the registration process fails to filter security-sensitive client attributes when a new client is created. An attacker with a valid Initial Access Token can register a client that bypasses audience checks during token introspection. This allows the attacker to view sensitive identity information, roles, and session details from access tokens belonging to other applications in the same realm.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-105306
https://bugzilla.redhat.com/show_bug.cgi?id=2545802

Configurations

No configuration.

History

05 Oct 2026, 06:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-05 06:16

Updated : 2026-10-06 15:09

NVD link : CVE-2026-105306

Mitre link : CVE-2026-105306

CVE.ORG link : CVE-2026-105306

JSON object : View

Products Affected

No product.

CWE

CWE-862

Missing Authorization

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