CVE-2026-92855
High
Description
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.
SeverityHigh
CVSS7.4
Exploit probability—
Product
Red Hat Build of Keycloak
PublishedNov 5, 2026
First seenNov 5, 2026
Weakness typeCWE-287Improper authentication
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Red Hat Build of Keycloak | No range specified | — |
| Red Hat Red Hat Single Sign-On 7 | No range specified | — |
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