CVE-2026-37979
Published: May 19, 2026
Modified: May 20, 2026
CVSS v3.1
6.5
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.
| Vendor | Product | Versions |
|---|---|---|
Red Hat | Red Hat build of Keycloak 26.4 | unaffected 26.4.12-1 - < * |
Red Hat | Red Hat build of Keycloak 26.4 | unaffected 26.4-17 - < * |
Red Hat | Red Hat build of Keycloak 26.4 | unaffected 26.4-17 - < * |
Red Hat | Red Hat build of Keycloak 26.4.12 | All versions |
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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