From 081f953dc330cdf22e09c3286b9d957477f68c95 Mon Sep 17 00:00:00 2001
From: Jonathan Swoboda <154711427+swoboda1337@users.noreply.github.com>
Date: Thu, 5 Feb 2026 09:00:16 -0500
Subject: [PATCH] [core] Add capacity check to register_component_ (#13778)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
---
 esphome/core/application.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/esphome/core/application.cpp b/esphome/core/application.cpp
index 0e77be9ee4..0daabc0282 100644
--- a/esphome/core/application.cpp
+++ b/esphome/core/application.cpp
@@ -81,6 +81,10 @@ void Application::register_component_(Component *comp) {
       return;
     }
   }
+  if (this->components_.size() >= ESPHOME_COMPONENT_COUNT) {
+    ESP_LOGE(TAG, "Cannot register component %s - at capacity!", LOG_STR_ARG(comp->get_component_log_str()));
+    return;
+  }
   this->components_.push_back(comp);
 }
 void Application::setup() {