Red Hat build of Keycloak 26.4 · Vulnerability
cve-program · CVE-2026-93998
PublishedA 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.
Read the publisher's advisoryAffected versions, risk and source history
Related advisories and sources
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CVE-2026-93998 · CVE overview and exploitation status
cve-program · CVE-2026-93998
Related changes
Linked by CVE identifier- Keycloak-core: keycloak-core: saml adapter does not bind signed assertions to the configured identity provider issuer · Affected-version evidence changed · 6 Nov 2026
- Keycloak-core: keycloak-core: saml adapter does not bind signed assertions to the configured identity provider issuer · Affected-version evidence changed · 6 Nov 2026
- Keycloak-core: keycloak-core: saml adapter does not bind signed assertions to the configured identity provider issuer · Newly collected advisory · 5 Nov 2026