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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-37979 Detail

Description

A flaw was found in Keycloak. This access control vulnerability in Keycloak's OpenID Connect (OIDC) token introspection endpoint allows a confidential client to bypass audience restrictions. An attacker-controlled client with valid credentials can retrieve sensitive token claims intended for other resource servers, compromising the confidentiality of lightweight access tokens. This issue can be exploited remotely by any confidential client in the realm with valid credentials.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://access.redhat.com/errata/RHSA-2026:19596 Red Hat, Inc. Vendor Advisory 
https://access.redhat.com/errata/RHSA-2026:19597 Red Hat, Inc. Vendor Advisory 
https://access.redhat.com/security/cve/CVE-2026-37979 Red Hat, Inc. Vendor Advisory 
https://bugzilla.redhat.com/show_bug.cgi?id=2455328 Red Hat, Inc. Vendor Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-284 Improper Access Control CISA-ADP  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

7 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-37979
NVD Published Date:
05/19/2026
NVD Last Modified:
06/17/2026
Source:
Red Hat, Inc.