CVEvulnerability

CVE-2026-37979

6.5 MEDIUM Published 2026-05-19 Modified 2026-10-29 Official page ↗
Status
Modified
Published
2026-05-19
Last modified
2026-10-29
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Weaknesses
CWE-284, CWE-639

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.

Affected configurations

• redhat build of keycloak (>= 26.4 < 26.4.12)

Related

Weakness · CWE (2)

  • CWE-284 Improper Access Control weakness
  • CWE-639 Authorization Bypass Through User-Controlled Key weakness

References