SAML Adapter Vulnerability in Keycloak from Red Hat
CVE-2026-93998

7.4HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat AMQ Broker 7
Red Hat Build Of Keycloak
Red Hat Fuse 7
Red Hat Jboss Enterprise Application Platform 7
Vendor
CVE Published:
5 November 2026

What is CVE-2026-93998?

A vulnerability exists in the SAML adapter component of Keycloak that compromises the security of applications utilizing SAML-based authentication. The flaw arises from the adapter's failure to verify that the issuer of a signed SAML assertion corresponds to the expected identity provider for the application. In scenarios where multiple identity providers share a trusted signing key, an attacker in control of one such provider could craft a validly signed assertion, enabling unauthorized access. This can lead to potential administrative control over the application, raising significant security concerns.

References

https://access.redhat.com/security/cve/CVE-2026-93998
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2537164
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
7.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank SECTION: Create Trackers yes for reporting this issue.
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