diff --git a/src/specify_cli/extensions/_command_update_discovery.py b/src/specify_cli/extensions/_command_update_discovery.py
index c4bbd5241d..d028b505d1 100644
--- a/src/specify_cli/extensions/_command_update_discovery.py
+++ b/src/specify_cli/extensions/_command_update_discovery.py
@@ -98,7 +98,10 @@ def discover_updates(
             continue
 
         try:
-            catalog_version = pkg_version.Version(ext_info["version"])
+            raw_catalog_version = ext_info.get("version")
+            if not isinstance(raw_catalog_version, str):
+                raise pkg_version.InvalidVersion(raw_catalog_version)
+            catalog_version = pkg_version.Version(raw_catalog_version)
         except pkg_version.InvalidVersion:
             console.print(
                 f"⚠  {safe_ext_id}: Invalid catalog version "
diff --git a/tests/specify_cli/extensions/test_command_update.py b/tests/specify_cli/extensions/test_command_update.py
index c7428677a8..c454057994 100644
--- a/tests/specify_cli/extensions/test_command_update.py
+++ b/tests/specify_cli/extensions/test_command_update.py
@@ -667,6 +667,35 @@ def test_update_bundled_blocked_when_no_local_copy_exists(self, tmp_path):
         assert "upgrade spec-kit" in flat
         assert ExtensionManager(project_dir).registry.get("test-ext")["version"] == "1.0.0"
 
+    def test_update_skips_catalog_entry_without_version(self, tmp_path):
+        """A catalog entry with no version is skipped with a warning instead of
+        aborting the command with a KeyError."""
+        from specify_cli import app
+
+        runner = CliRunner()
+        project_dir = tmp_path / "project"
+        project_dir.mkdir()
+        (project_dir / ".specify").mkdir()
+        (project_dir / ".claude" / "skills").mkdir(parents=True)
+
+        manager = ExtensionManager(project_dir)
+        v1_dir = self._create_extension_source(tmp_path, "1.0.0")
+        manager.install_from_directory(v1_dir, "0.1.0")
+
+        with patch.object(Path, "cwd", return_value=project_dir), \
+             patch.object(ExtensionCatalog, "get_extension_info", return_value={
+                 "id": "test-ext",
+                 "name": "Test Extension",
+                 "download_url": "https://example.com/test-ext.zip",
+                 "_install_allowed": True,
+             }):
+            result = runner.invoke(app, ["extension", "update"], catch_exceptions=True)
+
+        flat = " ".join(result.output.split())
+        assert result.exit_code == 0, result.output
+        assert "test-ext: Invalid catalog version 'None' (skipping)" in flat
+        assert ExtensionManager(project_dir).registry.get("test-ext")["version"] == "1.0.0"
+
     def test_update_failure_rolls_back_registry_hooks_and_commands(self, tmp_path, monkeypatch):
         """Failed update should restore original registry, hooks, and command files."""
         from specify_cli import app
diff --git a/tests/specify_cli/extensions/test_command_update_discovery.py b/tests/specify_cli/extensions/test_command_update_discovery.py
index f9c3897ac2..6eaa18e242 100644
--- a/tests/specify_cli/extensions/test_command_update_discovery.py
+++ b/tests/specify_cli/extensions/test_command_update_discovery.py
@@ -3,6 +3,7 @@
 
 from pathlib import Path
 
+import pytest
 from packaging import version as pkg_version
 
 from specify_cli.extensions import _commands
@@ -74,6 +75,31 @@ def test_discovery_returns_typed_candidate():
     assert updates[0].catalog_name == "test"
 
 
+@pytest.mark.parametrize(
+    "version_field", [{}, {"version": None}, {"version": []}, {"version": 2}]
+)
+def test_discovery_skips_catalog_entry_without_valid_version(capsys, version_field):
+    manager = _Manager(
+        [{"id": "broken-ext"}, {"id": "test-ext"}],
+        {"broken-ext": {"version": "1.0.0"}, "test-ext": {"version": "1.0.0"}},
+    )
+    catalog = _Catalog(
+        {
+            "broken-ext": {"id": "broken-ext", "name": "Broken", **version_field},
+            "test-ext": {"id": "test-ext", "name": "Test Extension", "version": "2.0.0"},
+        }
+    )
+
+    updates, blocked, has_installed = discover_updates(manager, catalog, None)
+
+    output = " ".join(capsys.readouterr().out.split())
+    assert "broken-ext: Invalid catalog version" in output
+    assert "(skipping)" in output
+    assert [update.extension_id for update in updates] == ["test-ext"]
+    assert blocked == []
+    assert has_installed is True
+
+
 def test_discovery_blocks_stale_bundled_source(monkeypatch, tmp_path: Path):
     manager = _Manager(
         [{"id": "test-ext"}],