Red Hat Build of Keycloak/Single Sign-On Key Provider information disclosure

Summaryinfo

A vulnerability described as problematic has been identified in Red Hat Build of Keycloak and Single Sign-On. The affected element is an unknown function of the component Key Provider. The manipulation results in information disclosure. This vulnerability is identified as CVE-2026-19729. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as problematic has been found in Red Hat Build of Keycloak and Single Sign-On (unknown version). Affected is an unknown code block of the component Key Provider. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

A flaw was found in the key provider component of the keycloak-services library, which is the core engine for the Red Hat Build of Keycloak. The issue occurs because a previous fix for path probing was incomplete, allowing a realm administrator to still submit arbitrary filesystem paths as keystore parameters. This can be used to determine the existence and readability of files on the server, potentially exposing sensitive system information.

The advisory is shared for download at access.redhat.com. This vulnerability is traded as CVE-2026-19729 since 08/13/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation needs additional levels of successful authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/09/2026). The MITRE ATT&CK project declares the attack technique as T1592.

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
• Single Sign-On

License

• open-source

Website

• Vendor: https://www.redhat.com/

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