CVE-2026-97848
CVE-2026-97848
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Weakness classification (CWE)
References
- RHSA-2026:95759 (vendor-advisory)
- RHSA-2026:95760 (vendor-advisory)
- RHSA-2026:95761 (vendor-advisory)
- RHSA-2026:95762 (vendor-advisory)
- access.redhat.com/security/cve/CVE-2026-97848 (vdb-entry)
- RHBZ#2540960 (issue-tracking)
Frequently asked questions
- What is CVE-2026-97848?
- CVE-2026-97848 is a medium-severity vulnerability, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2026-11-06.
- How severe is CVE-2026-97848?
- Medium severity. CVSS v3 base score is 6.5 out of 10.