From 7b839951b7d2cb088a557c642c2dec65bc5953ce Mon Sep 17 00:00:00 2001
From: Jacek Kowalski <Jacek@jacekk.info>
Date: Tue, 03 Nov 2026 20:58:44 +0000
Subject: [PATCH] Bind service and proxy tickets to the service they were issued for

---
 src/main/java/org/keycloak/protocol/cas/endpoints/ProxyValidateEndpoint.java |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/src/main/java/org/keycloak/protocol/cas/endpoints/ProxyValidateEndpoint.java b/src/main/java/org/keycloak/protocol/cas/endpoints/ProxyValidateEndpoint.java
index 35468f8..ff1930e 100644
--- a/src/main/java/org/keycloak/protocol/cas/endpoints/ProxyValidateEndpoint.java
+++ b/src/main/java/org/keycloak/protocol/cas/endpoints/ProxyValidateEndpoint.java
@@ -27,6 +27,7 @@
     @NoCache
     public Response build() {
         MultivaluedMap<String, String> params = session.getContext().getUri().getQueryParameters();
+        String service = params.getFirst(CASLoginProtocol.SERVICE_PARAM);
         String ticket = params.getFirst(CASLoginProtocol.TICKET_PARAM);
         String pgtUrl = params.getFirst(CASLoginProtocol.PGTURL_PARAM);
         boolean renew = params.containsKey(CASLoginProtocol.RENEW_PARAM);
@@ -45,6 +46,7 @@
 
             checkSsl();
             checkRealm();
+            checkClient(service);
             checkTicket(ticket, prefix, renew);
             if (pgtUrl != null) createProxyGrant(pgtUrl);
             event.success();

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