CVE-2026-37979

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.

Score
CVSS 3.1 6.5 Medium
Status
Analyzed - secalert@redhat.com
Published
2026-05-19
Last modified
2026-10-26
Weaknesses
CWE-284

Affected products

References

 
 
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