CVE-2026-46389: Defenseunicorns Uds Identity Config

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

UDS Identity Config builds the Keycloak configuration image (realm, plugins, theme, truststore, JARs) consumed by UDS Core's Identity deployment. In versions 0.11.0 through 0.26.0, a logic error in the `client-kubernetes-secret` Keycloak client authenticator (shipped by `uds-identity-config` and consumed by UDS Core) causes the submitted `client_secret` to be overwritten with the mounted Kubernetes secret before comparison. An attacker who can reach the Keycloak token endpoint and knows a `client_id` using this authenticator can authenticate as that client with any `client_secret` value and obtain OAuth2 tokens scoped to the client's service account. In the case of the `uds-operator` client this token can be used to registry/modify other clients. Version 0.26.1 patches the issue.

Affected products

• Defenseunicorns Uds Identity Config: from 0.11.0, before 0.26.1 (fixed in 0.26.1)

Published 2026-06-05. Last modified 2026-06-17.