CVE-2026-105302

A flaw was found in the User Session Note mapper of the Keycloak identity and access management solution. The issue occurs because the mapper does not validate whether a requested session note contains sensitive internal credentials, such as federated access tokens from external identity providers. This allows a delegated client administrator to leak a user's upstream bearer tokens into the tokens issued to their managed application, potentially leading to unauthorized access to the user's data on external platforms.

CVSS v3 5.7 MEDIUM

5.7^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.1 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-105302
https://bugzilla.redhat.com/show_bug.cgi?id=2545800

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-2026-105302

Mitre link : CVE-2026-105302

CVE.ORG link : CVE-2026-105302

JSON object : View

Products Affected

No product.

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

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