MEDIUM 4.2 Maven
Keycloak Services has Improper Validation of Consistency within Input
GHSA-wcvj-vpvw-9rr5 · CVE-2026-9689
Published · Modified
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.
References
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-9689
- WEB https://github.com/keycloak/keycloak/issues/49430
- WEB https://github.com/keycloak/keycloak/pull/49959
- WEB https://github.com/keycloak/keycloak/commit/18832bcae5bebd5a1d66c2ec5fcd640e576fa625
- WEB https://github.com/keycloak/keycloak/commit/1f58a4b79a258bcf2ef86b58fbf0016cdb91291f
- WEB https://github.com/keycloak/keycloak/commit/267a1a33d4dc1eac7622614ba9772b4e1e35726f
- WEB https://access.redhat.com/security/cve/CVE-2026-9689
- WEB https://bugzilla.redhat.com/show_bug.cgi?id=2481845
- PACKAGE https://github.com/keycloak/keycloak
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