GHSA-wcvj-vpvw-9rr5
Keycloak Services has Improper Validation of Consistency within Input
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Maven | org.keycloak:keycloak-services | >= 26.5.0, <= 26.6.4 | no fix listed |
| Maven | org.keycloak:keycloak-services | <= 26.4.7 | no fix listed |
Details
As written in the advisory (Markdown source, shown as plain text).
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
External links from the advisory. They lead to third-party sites.
- https://nvd.nist.gov/vuln/detail/CVE-2026-9689
- https://github.com/keycloak/keycloak/issues/49430
- https://github.com/keycloak/keycloak/pull/49959
- https://github.com/keycloak/keycloak/commit/18832bcae5bebd5a1d66c2ec5fcd640e576fa625
- https://github.com/keycloak/keycloak/commit/1f58a4b79a258bcf2ef86b58fbf0016cdb91291f
- https://github.com/keycloak/keycloak/commit/267a1a33d4dc1eac7622614ba9772b4e1e35726f
- 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
- https://github.com/keycloak/keycloak