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.
References
| Link | Resource |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:19596 | Vendor Advisory |
| https://access.redhat.com/errata/RHSA-2026:19597 | Vendor Advisory |
| https://access.redhat.com/security/cve/CVE-2026-37979 | Vendor Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=2455328 | Vendor Advisory |
Configurations
History
03 Jun 2026, 19:50
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Redhat
Redhat build Of Keycloak |
|
| CPE | cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:* | |
| References | () https://access.redhat.com/errata/RHSA-2026:19596 - Vendor Advisory | |
| References | () https://access.redhat.com/errata/RHSA-2026:19597 - Vendor Advisory | |
| References | () https://access.redhat.com/security/cve/CVE-2026-37979 - Vendor Advisory | |
| References | () https://bugzilla.redhat.com/show_bug.cgi?id=2455328 - Vendor Advisory |
20 May 2026, 17:16
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
20 May 2026, 12:16
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
19 May 2026, 15:16
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-284 |
19 May 2026, 12:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-19 12:16
Updated : 2026-06-03 19:50
NVD link : CVE-2026-37979
Mitre link : CVE-2026-37979
CVE.ORG link : CVE-2026-37979
JSON object : View
Products Affected
redhat
- build_of_keycloak
CWE
CWE-284
Improper Access Control