CVE-2026-93998
CVE-2026-93998
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Weakness classification (CWE)
References
- RHSA-2026:95759 (vendor-advisory)
- RHSA-2026:95760 (vendor-advisory)
- RHSA-2026:95761 (vendor-advisory)
- RHSA-2026:95762 (vendor-advisory)
- access.redhat.com/security/cve/CVE-2026-93998 (vdb-entry)
- RHBZ#2537164 (issue-tracking)
Frequently asked questions
- What is CVE-2026-93998?
- CVE-2026-93998 is a high-severity vulnerability, classified under Improper Verification of Cryptographic Signature. CVSS score: 7.4/10. Published 2026-11-05.
- How severe is CVE-2026-93998?
- High severity. CVSS v3 base score is 7.4 out of 10.