medium · CVSS v3 6.5

CVE-2026-97848

A flaw was found in the token sanitization logic of Keycloak, an open source identity and access management solution. Th…

Description

A flaw was found in the token sanitization logic of Keycloak, an open source identity and access management solution. The issue occurs when a protocol mapper is configured to emit structured claims using the JSON type. The security check designed to remove unauthorized role mappings only looks for standard Java maps and fails to recognize Jackson based JSON objects. This allows an attacker to inject forged client roles into security tokens, which could lead to unauthorized access to protected resources.

Scores

Severity
medium
CVSS v2
6.8
CVSS v3
6.5
CVSS v4
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EPSS
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