CVE-2026-7571

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.

Traduire en français

Produits concernés

• Red Hat build of Keycloak 26.4
• Red Hat build of Keycloak 26.4.12
• Redhat build of keycloak

Scores CVSS

Faiblesses (CWE)

• CWE-472

Références

• 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-2026-7571 Vendor Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2464263 Vendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories