CVE-2026-7571 (GCVE-0-2026-7571)
Vulnerability from cvelistv5
Published
2026-05-19 11:01
Modified
2026-05-20 16:08
CWE
  • CWE-472 - External Control of Assumed-Immutable Web Parameter
Summary
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.
References
https://access.redhat.com/errata/RHSA-2026:19596 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19597 vendor-advisory, x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-7571 vdb-entry, x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2464263 issue-tracking, x_refsource_REDHAT
Impacted products
Vendor Product Version
Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4.12-1   < *
    cpe:/a:redhat:build_keycloak:26.4::el9
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   Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4-17   < *
    cpe:/a:redhat:build_keycloak:26.4::el9
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   Red Hat Red Hat build of Keycloak 26.4 Unaffected: 26.4-17   < *
    cpe:/a:redhat:build_keycloak:26.4::el9
Create a notification for this product.
   Red Hat Red Hat build of Keycloak 26.4.12     cpe:/a:redhat:build_keycloak:26.4::el9
Create a notification for this product.
Show details on NVD website


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