Red Hat AMQ Broker SAML adapter improper authentication

Summaryinfo

A vulnerability was found in Red Hat AMQ Broker, Build of Keycloak, Fuse 7, JBoss Enterprise Application Platform, JBoss Enterprise Application Platform Expansion Pack, Satellite 6 and Single Sign-On. It has been classified as critical. This vulnerability affects unknown code of the component SAML adapter. The manipulation leads to improper authentication. This vulnerability is referenced as CVE-2026-93998. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Red Hat AMQ Broker, Build of Keycloak, Fuse 7, JBoss Enterprise Application Platform, JBoss Enterprise Application Platform Expansion Pack, Satellite 6 and Single Sign-On and classified as critical. This issue affects an unknown code block of the component SAML adapter. The manipulation with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A flaw was found in the SAML adapter component of Keycloak, which is used to secure applications with SAML-based authentication. The adapter fails to verify that the issuer of a signed SAML assertion matches the expected identity provider configured for the application. If multiple identity providers share the same trusted signing key, an attacker who controls one of those providers can create a validly signed assertion to log into the application as any user, potentially gaining full administrative control.

It is possible to read the advisory at access.redhat.com. The identification of this vulnerability is CVE-2026-93998 since 09/19/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 11/05/2026).

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

Type

• Application Server Software

Vendor

• Red Hat

Name

• AMQ Broker
• Build of Keycloak
• Fuse 7
• JBoss Enterprise Application Platform
• JBoss Enterprise Application Platform Expansion Pack
• Satellite 6
• Single Sign-On

License

• open-source

Website

• Vendor: https://www.redhat.com/

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