CVE-2026-4874
Low · 3.1CVSS
3.1
EPSS
0.4%
Published
Mar 26, 2026
CISA due date
—
The record
A flaw was found in Keycloak. An authenticated attacker can perform Server-Side Request Forgery (SSRF) by manipulating the `client_session_host` parameter during refresh token requests. This occurs when a Keycloak client is configured to use the `backchannel.logout.url` with the `application.session.host` placeholder. Successful exploitation allows the attacker to make HTTP requests from the Keycloak server’s network context, potentially probing internal networks or internal APIs, leading to information disclosure.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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