CVE-2026-4874
low-risk
Published 2026-03-26
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.
Do I need to act?
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0.02% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
3
CVSS 3.1/10
Low
NETWORK
/ HIGH complexity
Affected Products (4)
Jboss Enterprise Application Platform Expansion Pack
Affected Vendors
References (2)
Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-4874
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2451611
21
/ 100
low-risk
Severity
11/34 · Low
Exploitability
0/34 · Minimal
Exposure
10/34 · Low