Red Hat Build of Keycloak Configuration Endpoint improper authorization

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Red Hat Build of Keycloak. This vulnerability affects unknown code of the component Configuration Endpoint. The manipulation leads to improper authorization. This vulnerability is uniquely identified as CVE-2026-16104. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Red Hat Build of Keycloak (affected version unknown) and classified as problematic. This issue affects an unknown functionality of the component Configuration Endpoint. The manipulation with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality. The summary by CVE is:

A flaw was found in the authentication configuration endpoint of the keycloak-services component, which is the core engine for Red Hat Build of Keycloak identity and access management. The issue occurs because the system fails to mask sensitive configuration values, such as reCAPTCHA secret keys, when they are requested by administrators with view-only permissions. This can lead to the exposure of third-party service credentials to unauthorized personnel or through administrative logs.

The advisory is shared at access.redhat.com. The identification of this vulnerability is CVE-2026-16104 since 07/17/2026. The exploitation is known to be easy. The attack may be initiated remotely. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 07/17/2026). MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Red Hat

Name

• Build of Keycloak

License

• open-source

Website

• Vendor: https://www.redhat.com/

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