diff --git a/homeassistant/package_constraints.txt b/homeassistant/package_constraints.txt
index 2f52348d137..66f442b6809 100644
--- a/homeassistant/package_constraints.txt
+++ b/homeassistant/package_constraints.txt
@@ -6,7 +6,7 @@ aiodns==3.4.0
 aiohasupervisor==0.3.1
 aiohttp-asyncmdnsresolver==0.1.1
 aiohttp-fast-zlib==0.2.3
-aiohttp==3.12.8
+aiohttp==3.12.9
 aiohttp_cors==0.8.1
 aiousbwatcher==1.1.1
 aiozoneinfo==0.2.3
diff --git a/pyproject.toml b/pyproject.toml
index eee77213806..eb40aa3539e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,7 +28,7 @@ dependencies = [
   # change behavior based on presence of supervisor. Deprecated with #127228
   # Lib can be removed with 2025.11
   "aiohasupervisor==0.3.1",
-  "aiohttp==3.12.8",
+  "aiohttp==3.12.9",
   "aiohttp_cors==0.8.1",
   "aiohttp-fast-zlib==0.2.3",
   "aiohttp-asyncmdnsresolver==0.1.1",
diff --git a/requirements.txt b/requirements.txt
index 3fb78431bad..3bcf7faf16b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@
 # Home Assistant Core
 aiodns==3.4.0
 aiohasupervisor==0.3.1
-aiohttp==3.12.8
+aiohttp==3.12.9
 aiohttp_cors==0.8.1
 aiohttp-fast-zlib==0.2.3
 aiohttp-asyncmdnsresolver==0.1.1