diff --git a/app/routers/qualys.py b/app/routers/qualys.py
index 5a23f4c..7d4bbf7 100644
--- a/app/routers/qualys.py
+++ b/app/routers/qualys.py
@@ -517,11 +517,15 @@ def qualys_agents_page(request: Request, db=Depends(get_db)):
     inactive = [{"hostname": r.hostname, "os": r.os, "agent_version": r.agent_version,
                  "last_checkin": r.last_checkin, "etat": r.etat or ""} for r in inactive_rows]
 
+    from ..services.qualys_service import is_refresh_running
+    sync_running = is_refresh_running()
+
     ctx = base_context(request, db, user)
     ctx.update({
         "app_name": APP_NAME, "keys": keys, "summary": summary,
         "no_agent_servers": no_agent, "inactive_agents": inactive,
         "msg": request.query_params.get("msg", ""),
+        "sync_running": sync_running,
     })
     return templates.TemplateResponse("qualys_agents.html", ctx)
 
diff --git a/app/templates/qualys_agents.html b/app/templates/qualys_agents.html
index fbdacc7..8574419 100644
--- a/app/templates/qualys_agents.html
+++ b/app/templates/qualys_agents.html
@@ -7,10 +7,10 @@
         <p class="text-xs text-gray-500 mt-1">Activation keys et versions des agents déployés</p>
     </div>
     <div style="display:flex;gap:8px">
-        <button id="btn-refresh-diff" class="btn-primary px-4 py-2 text-sm" onclick="refreshAgents('diff')" title="Pull seulement les assets modifies depuis le dernier sync">
+        <button id="btn-refresh-diff" class="btn-primary px-4 py-2 text-sm" onclick="refreshAgents('diff')" title="Pull seulement les assets modifies depuis le dernier sync" {% if sync_running %}disabled{% endif %}>
             Sync rapide (diff)
         </button>
-        <button id="btn-refresh-full" class="btn-sm bg-cyber-yellow text-black px-4 py-2 text-sm" onclick="refreshAgents('full')" title="Pull complet (5-10 min). A faire 1x par jour">
+        <button id="btn-refresh-full" class="btn-sm bg-cyber-yellow text-black px-4 py-2 text-sm" onclick="refreshAgents('full')" title="Pull complet (5-10 min). A faire 1x par jour" {% if sync_running %}disabled{% endif %}>
             Sync complete
         </button>
         <a href="/qualys/deploy" class="btn-sm bg-cyber-border text-gray-300 px-4 py-2">Déployer</a>
@@ -18,6 +18,20 @@
     </div>
 </div>
 
+{% if sync_running %}
+<div class="card p-3 mb-4" style="border:1px solid #f59e0b;background:rgba(245,158,11,0.1)">
+    <div class="flex justify-between items-center">
+        <div>
+            <span class="text-cyber-yellow font-bold">⏳ Synchronisation Qualys en cours</span>
+            <span class="text-xs text-gray-400 ml-2">Les boutons de sync sont désactivés. Les données ci-dessous peuvent être en cours de mise à jour.</span>
+        </div>
+        <form method="POST" action="/qualys/agents/cancel" style="display:inline">
+            <button class="btn-sm bg-cyber-red text-white px-3 py-1">Annuler</button>
+        </form>
+    </div>
+</div>
+{% endif %}
+
 <!-- Overlay chargement -->
 <div id="refresh-overlay" style="display:none;position:fixed;inset:0;background:rgba(0,0,0,0.7);z-index:9999;justify-content:center;align-items:center">
     <div class="card p-6 text-center" style="min-width:320px">