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Medium severity4.2NVD Advisory· Published May 27, 2026· Updated Aug 20, 2026

CVE-2026-9689

CVE-2026-9689

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
org.keycloak:keycloak-servicesMaven
>= 26.5.0, <= 26.6.4—
org.keycloak:keycloak-servicesMaven
<= 26.4.7—

Affected products

11

Patches

Vulnerability mechanics

References

13

News mentions

1