diff --git a/supervisor/addons/const.py b/supervisor/addons/const.py
index 7db9d38ee..06d9f8c26 100644
--- a/supervisor/addons/const.py
+++ b/supervisor/addons/const.py
@@ -26,3 +26,5 @@ ADDON_UPDATE_CONDITIONS = [
     JobCondition.PLUGINS_UPDATED,
     JobCondition.SUPERVISOR_UPDATED,
 ]
+
+RE_SLUG = r"[-_.A-Za-z0-9]+"
diff --git a/supervisor/addons/validate.py b/supervisor/addons/validate.py
index bfb5073ce..e0a98489f 100644
--- a/supervisor/addons/validate.py
+++ b/supervisor/addons/validate.py
@@ -109,7 +109,7 @@ from ..validate import (
     uuid_match,
     version_tag,
 )
-from .const import ATTR_BACKUP, ATTR_CODENOTARY, AddonBackupMode
+from .const import ATTR_BACKUP, ATTR_CODENOTARY, RE_SLUG, AddonBackupMode
 from .options import RE_SCHEMA_ELEMENT
 
 _LOGGER: logging.Logger = logging.getLogger(__name__)
@@ -147,6 +147,8 @@ RE_MACHINE = re.compile(
     r")$"
 )
 
+RE_SLUG_FIELD = re.compile(r"^" + RE_SLUG + r"$")
+
 
 def _warn_addon_config(config: dict[str, Any]):
     """Warn about miss configs."""
@@ -252,7 +254,7 @@ _SCHEMA_ADDON_CONFIG = vol.Schema(
     {
         vol.Required(ATTR_NAME): str,
         vol.Required(ATTR_VERSION): version_tag,
-        vol.Required(ATTR_SLUG): str,
+        vol.Required(ATTR_SLUG): vol.Match(RE_SLUG_FIELD),
         vol.Required(ATTR_DESCRIPTON): str,
         vol.Required(ATTR_ARCH): [vol.In(ARCH_ALL)],
         vol.Optional(ATTR_MACHINE): vol.All([vol.Match(RE_MACHINE)], vol.Unique()),
diff --git a/supervisor/api/middleware/security.py b/supervisor/api/middleware/security.py
index 2881ed6db..955d215f7 100644
--- a/supervisor/api/middleware/security.py
+++ b/supervisor/api/middleware/security.py
@@ -8,6 +8,7 @@ from aiohttp.web import Request, RequestHandler, Response, middleware
 from aiohttp.web_exceptions import HTTPBadRequest, HTTPForbidden, HTTPUnauthorized
 from awesomeversion import AwesomeVersion
 
+from ...addons.const import RE_SLUG
 from ...const import (
     REQUEST_FROM,
     ROLE_ADMIN,
@@ -27,7 +28,7 @@ _CORE_VERSION: Final = AwesomeVersion("2023.3.0")
 
 _CORE_FRONTEND_PATHS: Final = (
     r"|/app/.*\.(?:js|gz|json|map)"
-    r"|/(store/)?addons/[^/]+/(logo|icon)"
+    r"|/(store/)?addons/" + RE_SLUG + r"/(logo|icon)"
 )
 
 CORE_FRONTEND: Final = re.compile(
@@ -51,7 +52,7 @@ NO_SECURITY_CHECK: Final = re.compile(
     r"|/core/api/.*"
     r"|/core/websocket"
     r"|/supervisor/ping"
-    r"|/ingress/[^/]+/.*"
+    r"|/ingress/[-_A-Za-z0-9]+/.*"
     + _CORE_FRONTEND_PATHS
     + r")$"
 )
@@ -98,7 +99,7 @@ ADDONS_ROLE_ACCESS: dict[str, re.Pattern] = {
     ROLE_MANAGER: re.compile(
         r"^(?:"
         r"|/.+/info"
-        r"|/addons(?:/[^/]+/(?!security).+|/reload)?"
+        r"|/addons(?:/" + RE_SLUG + r"/(?!security).+|/reload)?"
         r"|/audio/.+"
         r"|/auth/cache"
         r"|/cli/.+"
diff --git a/tests/addons/test_config.py b/tests/addons/test_config.py
index 588ccd129..a761d1e56 100644
--- a/tests/addons/test_config.py
+++ b/tests/addons/test_config.py
@@ -249,3 +249,38 @@ def test_watchdog_url():
     ):
         config["watchdog"] = test_options
         assert vd.SCHEMA_ADDON_CONFIG(config)
+
+
+def test_valid_slug():
+    """Test valid and invalid addon slugs."""
+    config = load_json_fixture("basic-addon-config.json")
+
+    # All examples pulled from https://analytics.home-assistant.io/addons.json
+    config["slug"] = "uptime-kuma"
+    assert vd.SCHEMA_ADDON_CONFIG(config)
+
+    config["slug"] = "hassio_google_drive_backup"
+    assert vd.SCHEMA_ADDON_CONFIG(config)
+
+    config["slug"] = "paradox_alarm_interface_3.x"
+    assert vd.SCHEMA_ADDON_CONFIG(config)
+
+    config["slug"] = "Lupusec2Mqtt"
+    assert vd.SCHEMA_ADDON_CONFIG(config)
+
+    # No whitespace
+    config["slug"] = "my addon"
+    with pytest.raises(vol.Invalid):
+        assert vd.SCHEMA_ADDON_CONFIG(config)
+
+    # No url control chars (or other non-word ascii characters)
+    config["slug"] = "a/b_&_c\\d_@ddon$:_test=#2?"
+    with pytest.raises(vol.Invalid):
+        assert vd.SCHEMA_ADDON_CONFIG(config)
+
+    # No unicode
+    config["slug"] = "complemento telefónico"
+    with pytest.raises(vol.Invalid):
+        assert vd.SCHEMA_ADDON_CONFIG(config)
+
+    #