CVE-2026-7571
Published: May 19, 2026
Modified: May 20, 2026
CVSS v3.1
7.1
Description
A flaw was found in Keycloak. A low-privilege user, with knowledge of user credentials and client ID, can bypass a security control intended to disable the implicit flow in OpenID Connect (OIDC) clients. By manipulating client data during a session restart, an attacker can obtain an access token that should not be available. This vulnerability can also lead to the exposure of these access tokens in server logs, proxy logs, and HTTP Referrer headers, resulting in sensitive information disclosure.
| 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 |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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