CVE-2026-109082

A flaw was found in the Client-Initiated Backchannel Authentication CIBA implementation within the keycloak-services component of Keycloak. This component handles advanced authentication flows where a client initiates a login on behalf of a user. The issue occurs because Keycloak fails to verify that a client is authorized to use the CIBA flow, allowing public clients to bypass security requirements. An attacker could use this flaw to trick a user into approving a login request, eventually gaining full access to the users account without needing a client secret.

CVSS v3 6.8 MEDIUM

6.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-109082
https://bugzilla.redhat.com/show_bug.cgi?id=2549478

Configurations

No configuration.

History

12 Oct 2026, 07:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-12 07:16

Updated : 2026-10-15 16:33

NVD link : CVE-2026-109082

Mitre link : CVE-2026-109082

CVE.ORG link : CVE-2026-109082

JSON object : View

Products Affected

No product.

CWE

CWE-287

Improper Authentication

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