CVE-2026-107623
Medium
Description
A flaw was found in the OIDC Dynamic Client Registration (DCR) component of Keycloak. A bug in the response serialization causes the backchannel logout offline token revocation setting to be omitted from responses. When a client performs a standard update, this missing information causes the setting to be silently disabled. As a result, offline tokens may remain valid even after a user session is terminated via backchannel logout.
SeverityMedium
CVSS4.3
Exploit probability—
Product
Red Hat Build of Keycloak
PublishedOct 8, 2026
First seenOct 8, 2026
Weakness typeCWE-862Missing authorization
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Red Hat Build of Keycloak | No range specified | — |
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