diff --git a/src/govoplan_core/core/module_package_catalog.py b/src/govoplan_core/core/module_package_catalog.py
index 14f92aa..0ca479c 100644
--- a/src/govoplan_core/core/module_package_catalog.py
+++ b/src/govoplan_core/core/module_package_catalog.py
@@ -658,6 +658,10 @@ def _normalize_catalog_item(value: Any) -> dict[str, object]:
         "availability": _catalog_availability(value, module_id=module_id),
         "availability_reason": _optional_str(value, "availability_reason"),
         "configuration_requirements": _string_list(value.get("configuration_requirements")),
+        "permissions": _normalize_catalog_permissions(
+            value.get("permissions"),
+            module_id=module_id,
+        ),
     }
     if item["availability"] == "withdrawn" and not item["availability_reason"]:
         raise ValueError(
@@ -784,6 +788,109 @@ def _catalog_availability(value: Mapping[str, object], *, module_id: str) -> str
     return availability
 
 
+def _normalize_catalog_permissions(
+    value: object,
+    *,
+    module_id: str,
+) -> list[dict[str, object]]:
+    if value is None:
+        return []
+    if not isinstance(value, list):
+        raise ValueError(
+            f"Module package catalog permissions for {module_id!r} must be a list."
+        )
+    if len(value) > 1000:
+        raise ValueError(
+            f"Module package catalog permissions for {module_id!r} exceed 1000 entries."
+        )
+    normalized: list[dict[str, object]] = []
+    seen: set[str] = set()
+    for raw in value:
+        if not isinstance(raw, Mapping):
+            raise ValueError(
+                f"Module package catalog permission entries for {module_id!r} must be objects."
+            )
+        scope = _bounded_catalog_permission_text(
+            raw,
+            "scope",
+            module_id=module_id,
+            maximum=200,
+        )
+        if scope in seen:
+            raise ValueError(
+                f"Module package catalog entry {module_id!r} declares permission {scope!r} more than once."
+            )
+        seen.add(scope)
+        level = _bounded_catalog_permission_text(
+            raw,
+            "level",
+            module_id=module_id,
+            maximum=20,
+        )
+        if level not in {"system", "tenant"}:
+            raise ValueError(
+                f"Module package catalog permission {module_id!r}/{scope!r} has unsupported level {level!r}."
+            )
+        deprecated = raw.get("deprecated", False)
+        if not isinstance(deprecated, bool):
+            raise ValueError(
+                f"Module package catalog permission {module_id!r}/{scope!r} deprecated must be true or false."
+            )
+        normalized.append(
+            {
+                "scope": scope,
+                "label": _bounded_catalog_permission_text(
+                    raw,
+                    "label",
+                    module_id=module_id,
+                    maximum=200,
+                ),
+                "description": _bounded_catalog_permission_text(
+                    raw,
+                    "description",
+                    module_id=module_id,
+                    maximum=1000,
+                ),
+                "category": _bounded_catalog_permission_text(
+                    raw,
+                    "category",
+                    module_id=module_id,
+                    maximum=120,
+                ),
+                "level": level,
+                "resource": _bounded_catalog_permission_text(
+                    raw,
+                    "resource",
+                    module_id=module_id,
+                    maximum=120,
+                ),
+                "action": _bounded_catalog_permission_text(
+                    raw,
+                    "action",
+                    module_id=module_id,
+                    maximum=120,
+                ),
+                "deprecated": deprecated,
+            }
+        )
+    return normalized
+
+
+def _bounded_catalog_permission_text(
+    value: Mapping[str, object],
+    key: str,
+    *,
+    module_id: str,
+    maximum: int,
+) -> str:
+    text = _required_str(value, key)
+    if len(text) > maximum:
+        raise ValueError(
+            f"Module package catalog permission {key!r} for {module_id!r} exceeds {maximum} characters."
+        )
+    return text
+
+
 def _normalize_catalog_source(
     value: object,
     *,
diff --git a/tests/test_module_system.py b/tests/test_module_system.py
index 4cfa2e9..1b1fbff 100644
--- a/tests/test_module_system.py
+++ b/tests/test_module_system.py
@@ -3504,6 +3504,16 @@ finally:
                 "python_ref": "govoplan-files==0.1.4",
                 "availability": "available",
                 "configuration_requirements": ["Object storage binding"],
+                "permissions": [{
+                    "scope": "files:file:read",
+                    "label": "Read files",
+                    "description": "Read managed files.",
+                    "category": "Files",
+                    "level": "tenant",
+                    "resource": "file",
+                    "action": "read",
+                    "deprecated": False,
+                }],
                 "release_notes_url": "https://git.example.test/modules/files/releases/v0.1.4",
                 "source": {
                     "repository": "govoplan-files",
@@ -3596,6 +3606,8 @@ finally:
         self.assertEqual(123, catalog[0]["artifact_integrity"]["python"]["size"])
         self.assertEqual("available", catalog[0]["availability"])
         self.assertEqual(["Object storage binding"], catalog[0]["configuration_requirements"])
+        self.assertEqual("files:file:read", catalog[0]["permissions"][0]["scope"])
+        self.assertEqual("tenant", catalog[0]["permissions"][0]["level"])
         self.assertEqual("v0.1.4", catalog[0]["source"]["tag"])
         self.assertEqual("a" * 40, catalog[0]["source"]["commit"])
         self.assertEqual(
@@ -3607,6 +3619,35 @@ finally:
         self.assertTrue(validation["valid"])
         self.assertEqual("files", validation["modules"][0]["module_id"])
 
+    def test_module_package_catalog_rejects_duplicate_permission_scopes(self) -> None:
+        root = Path(tempfile.mkdtemp(prefix="govoplan-module-package-permissions-", dir=_TEST_ROOT))
+        catalog_path = root / "catalog.json"
+        permission = {
+            "scope": "files:file:read",
+            "label": "Read files",
+            "description": "Read managed files.",
+            "category": "Files",
+            "level": "tenant",
+            "resource": "file",
+            "action": "read",
+            "deprecated": False,
+        }
+        catalog_path.write_text(
+            json.dumps({
+                "modules": [{
+                    "module_id": "files",
+                    "version": "0.1.4",
+                    "permissions": [permission, permission],
+                }],
+            }),
+            encoding="utf-8",
+        )
+
+        validation = validate_module_package_catalog(catalog_path)
+
+        self.assertFalse(validation["valid"])
+        self.assertIn("more than once", str(validation["error"]))
+
     def test_module_package_catalog_requires_reason_for_withdrawn_release(self) -> None:
         root = Path(tempfile.mkdtemp(prefix="govoplan-module-package-catalog-withdrawn-", dir=_TEST_ROOT))
         catalog_path = root / "catalog.json"