Auth bypass in Red Hat Single Sign-On 7
CVE-2026-92855
A flaw was found in the SAML identity broker component of Keycloak, which is used to delegate authentication to external identity providers. The issue occurs because the broker fails to verify that a user actually possesses the private key associated with a holder-of-key assertion. An attacker who intercepts a victim signed assertion can replay it to gain unauthorized access and impersonate the victim without needing their private key.
Vulnerability class: Broken Authentication
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.
Affected products
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-2026-92855 (vdb-entry)
- RHBZ#2535814 (issue-tracking)
Frequently asked questions
- What is CVE-2026-92855?
- CVE-2026-92855 is a high-severity vulnerability in Red Hat Single Sign-On 7, classified under Improper Authentication. CVSS score: 7.4/10. Published 2026-11-05.
- How severe is CVE-2026-92855?
- High severity. CVSS v3 base score is 7.4 out of 10.