Description
A flaw was found in Keycloak, an open-source identity and access management solution. When a client application is configured to accept broad redirect Uniform Resource Identifiers (URIs), a remote attacker can manipulate the authentication process by crafting a special web address. If a user clicks this link, the client application might incorrectly prioritize attacker-controlled information over legitimate data. This vulnerability, known as HTTP parameter pollution, could allow an attacker to bypass security measures or gain unauthorized access to resources.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Red Hat Red Hat build of Keycloak 26.4
Default version status: affected
26.4.14-1 to < *unaffected
Red Hat Red Hat build of Keycloak 26.4
Default version status: affected
26.4-22 to < *unaffected
Red Hat Red Hat build of Keycloak 26.4
Default version status: affected
26.4-22 to < *unaffected
Red Hat Red Hat build of Keycloak 26.4.14
Default version status: unaffected
Red Hat Red Hat build of Keycloak 26.6
Default version status: affected
26.6.5-1 to < *unaffected
Red Hat Red Hat build of Keycloak 26.6
Default version status: affected
26.6-11 to < *unaffected
Red Hat Red Hat build of Keycloak 26.6
Default version status: affected
26.6-11 to < *unaffected
Red Hat Red Hat build of Keycloak 26.6.5
Default version status: unaffected
References
- https://access.redhat.com/errata/RHSA-2026:50846 ↗
- https://access.redhat.com/errata/RHSA-2026:50847 ↗
- https://access.redhat.com/errata/RHSA-2026:50848 ↗
- https://access.redhat.com/errata/RHSA-2026:50849 ↗
- https://access.redhat.com/security/cve/CVE-2026-9689 ↗
- https://bugzilla.redhat.com/show_bug.cgi?id=2481845 ↗