diff --git a/components/collector/src/source_collectors/dependency_track/base.py b/components/collector/src/source_collectors/dependency_track/base.py
index 887dfd86bd..dfe8d52546 100644
--- a/components/collector/src/source_collectors/dependency_track/base.py
+++ b/components/collector/src/source_collectors/dependency_track/base.py
@@ -24,7 +24,7 @@ class DependencyTrackProject(TypedDict):
     lastBomImport: int
     name: str
     uuid: str
-    version: str
+    version: NotRequired[str]
     metrics: NotRequired[DependencyTrackMetrics]
 
 
@@ -87,7 +87,8 @@ async def _get_projects_from_response(self, response: Response) -> AsyncIterator
     def _project_matches(project: DependencyTrackProject, names: list[str], versions: list[str]) -> bool:
         """Return whether the project name matches the project names and versions."""
         project_matches_name = match_string_or_regular_expression(project["name"], names) if names else True
-        project_matches_version = match_string_or_regular_expression(project["version"], versions) if versions else True
+        project_version = project.get("version", "unknown")
+        project_matches_version = match_string_or_regular_expression(project_version, versions) if versions else True
         return project_matches_name and project_matches_version
 
     @staticmethod
diff --git a/components/collector/src/source_collectors/dependency_track/dependencies.py b/components/collector/src/source_collectors/dependency_track/dependencies.py
index 75a7f0a74a..90cc7e19bf 100644
--- a/components/collector/src/source_collectors/dependency_track/dependencies.py
+++ b/components/collector/src/source_collectors/dependency_track/dependencies.py
@@ -1,6 +1,6 @@
 """Dependency-Track security warnings collector."""
 
-from typing import TypedDict
+from typing import NotRequired, TypedDict
 
 from collector_utilities.type import URL
 from model import Entities, Entity, SourceResponses
@@ -14,14 +14,14 @@ class DependencyTrackRepositoryMetaData(TypedDict):
     latestVersion: str
 
 
-class DependencyTrackComponent(TypedDict, total=False):
+class DependencyTrackComponent(TypedDict):
     """Component as returned by Dependency-Track."""
 
     name: str
     project: DependencyTrackProject
-    repositoryMeta: DependencyTrackRepositoryMetaData
     uuid: str
-    version: str
+    repositoryMeta: NotRequired[DependencyTrackRepositoryMetaData]
+    version: NotRequired[str]
 
 
 class DependencyTrackDependencies(DependencyTrackLatestVersionStatusBase):
@@ -45,7 +45,7 @@ async def _parse_entities(self, responses: SourceResponses) -> Entities:
     def _create_entity(self, component: DependencyTrackComponent) -> Entity:
         """Create an entity from the component."""
         project = component["project"]
-        current_version = component["version"]
+        current_version = component.get("version", "unknown")
         latest_version = component.get("repositoryMeta", {}).get("latestVersion", "unknown")
         landing_url = str(self._parameter("landing_url")).strip("/")
         return Entity(
diff --git a/components/collector/tests/source_collectors/dependency_track/base_test.py b/components/collector/tests/source_collectors/dependency_track/base_test.py
index c9768a9794..13cd2e6d22 100644
--- a/components/collector/tests/source_collectors/dependency_track/base_test.py
+++ b/components/collector/tests/source_collectors/dependency_track/base_test.py
@@ -10,14 +10,14 @@ class DependencyTrackTestCase(SourceCollectorTestCase):
 
     SOURCE_TYPE = "dependency_track"
 
-    def projects(self) -> list[DependencyTrackProject]:
+    def projects(self, version: str = "1.4") -> list[DependencyTrackProject]:
         """Create the Dependency-Track projects fixture."""
-        return [
-            DependencyTrackProject(
-                name="project name",
-                uuid="project uuid",
-                version="1.4",
-                lastBomImport=0,
-                metrics=DependencyTrackMetrics(),
-            ),
-        ]
+        project = DependencyTrackProject(
+            name="project name",
+            uuid="project uuid",
+            lastBomImport=0,
+            metrics=DependencyTrackMetrics(),
+        )
+        if version:
+            project["version"] = version
+        return [project]
diff --git a/components/collector/tests/source_collectors/dependency_track/test_dependencies.py b/components/collector/tests/source_collectors/dependency_track/test_dependencies.py
index 703df76f23..bb34df9669 100644
--- a/components/collector/tests/source_collectors/dependency_track/test_dependencies.py
+++ b/components/collector/tests/source_collectors/dependency_track/test_dependencies.py
@@ -15,8 +15,8 @@ def dependencies(self, latest_version: str) -> list[DependencyTrackComponent]:
         dependency: DependencyTrackComponent = {
             "name": "component name",
             "project": self.projects()[0],
-            "uuid": "component-uuid",
             "version": "1.0",
+            "uuid": "component-uuid",
         }
         if latest_version:
             dependency["repositoryMeta"] = {"latestVersion": latest_version}
@@ -62,14 +62,26 @@ async def test_unknown_latest_version(self):
         response = await self.collect(get_request_json_side_effect=[self.projects(), self.dependencies("")])
         self.assert_measurement(response, value="1", entities=self.entities("unknown", "unknown"))
 
-    async def test_filter_by_latest_version_status(self):
+    async def test_filter_by_latest_version_status_with_match(self):
+        """Test that components can be filtered by latest version status."""
+        self.set_source_parameter("latest_version_status", ["up-to-date"])
+        response = await self.collect(get_request_json_side_effect=[self.projects(), self.dependencies("1.0")])
+        self.assert_measurement(response, value="1", entities=self.entities("1.0", "up-to-date"))
+
+    async def test_filter_by_latest_version_status_without_match(self):
         """Test that components can be filtered by latest version status."""
         self.set_source_parameter("latest_version_status", ["update possible"])
         response = await self.collect(get_request_json_side_effect=[self.projects(), self.dependencies("1.0")])
         self.assert_measurement(response, value="0", entities=[])
 
-    async def test_filter_by_project_name(self):
-        """Test filtering projects by name."""
+    async def test_filter_by_project_name_with_match(self):
+        """Test filtering projects by name and match."""
+        self.set_source_parameter("project_names", ["project name", "other project"])
+        response = await self.collect(get_request_json_side_effect=[self.projects(), self.dependencies("1.0")])
+        self.assert_measurement(response, value="1", entities=self.entities("1.0", "up-to-date"))
+
+    async def test_filter_by_project_name_without_match(self):
+        """Test filtering projects by name without match."""
         self.set_source_parameter("project_names", ["other project"])
         response = await self.collect(get_request_json_return_value=self.projects())
         self.assert_measurement(response, value="0", entities=[])
@@ -80,8 +92,14 @@ async def test_filter_by_project_regular_expression(self):
         response = await self.collect(get_request_json_side_effect=[self.projects(), self.dependencies("1.0")])
         self.assert_measurement(response, value="1", entities=self.entities("1.0", "up-to-date"))
 
-    async def test_filter_by_project_version(self):
-        """Test filtering projects by version."""
+    async def test_filter_by_project_version_with_match(self):
+        """Test filtering projects by version with a match."""
+        self.set_source_parameter("project_versions", ["1.2", "1.3", "1.4"])
+        response = await self.collect(get_request_json_side_effect=[self.projects(), self.dependencies("1.0")])
+        self.assert_measurement(response, value="1", entities=self.entities("1.0", "up-to-date"))
+
+    async def test_filter_by_project_version_without_match(self):
+        """Test filtering projects by version without a match."""
         self.set_source_parameter("project_versions", ["1.2", "1.3"])
         response = await self.collect(get_request_json_return_value=self.projects())
         self.assert_measurement(response, value="0", entities=[])
@@ -92,3 +110,9 @@ async def test_filter_by_project_name_and_version(self):
         self.set_source_parameter("project_versions", ["1.3", "1.4"])
         response = await self.collect(get_request_json_side_effect=[self.projects(), self.dependencies("1.0")])
         self.assert_measurement(response, value="1", entities=self.entities("1.0", "up-to-date"))
+
+    async def test_filter_by_project_version_when_project_has_no_version(self):
+        """Test filtering projects by version."""
+        self.set_source_parameter("project_versions", ["1.2", "1.3"])
+        response = await self.collect(get_request_json_return_value=self.projects(version=""))
+        self.assert_measurement(response, value="0", entities=[])
diff --git a/components/collector/tests/source_collectors/dependency_track/test_source_up_to_dateness.py b/components/collector/tests/source_collectors/dependency_track/test_source_up_to_dateness.py
index 21d682a15c..4740342820 100644
--- a/components/collector/tests/source_collectors/dependency_track/test_source_up_to_dateness.py
+++ b/components/collector/tests/source_collectors/dependency_track/test_source_up_to_dateness.py
@@ -20,7 +20,7 @@ class DependencyTrackSourceUpToDatenessVersionTest(DependencyTrackTestCase):
     METRIC_TYPE = "source_up_to_dateness"
     LANDING_URL = "https://dependency_track"
 
-    def projects(self) -> list[DependencyTrackProject]:
+    def projects(self, version: str = "1.4") -> list[DependencyTrackProject]:
         """Create Dependency-Track projects fixture."""
         now = datetime.now(tz=tzlocal()).replace(microsecond=0)
         self.yesterday = now - timedelta(days=1)
diff --git a/docs/src/changelog.md b/docs/src/changelog.md
index ba84ce9ca4..6e1a6657e1 100644
--- a/docs/src/changelog.md
+++ b/docs/src/changelog.md
@@ -24,6 +24,7 @@ If your currently installed *Quality-time* version is not the latest version, pl
 - Increase contrast for disabled items in the menu bar. Fixes [#10840](https://github.com/ICTU/quality-time/issues/10840).
 - Links to documentation on Read the Docs for subjects, metrics, or sources with hyphens in their name wouldn't scroll to the right location. Fixes [#10843](https://github.com/ICTU/quality-time/issues/10843).
 - Metric details were not shown in exports to PDF. Fixes [#10845](https://github.com/ICTU/quality-time/issues/10845).
+- Do not assume that Dependency-Track projects and components always have a version number. Fixes [#10848](https://github.com/ICTU/quality-time/issues/10848).
 - The software documentation was outdated (among other things, the API-server health check endpoint). Fixes [#10858](https://github.com/ICTU/quality-time/issues/10858).
 - Keep the footer at the bottom of the page even if the report is very short. Fixes [#10877](https://github.com/ICTU/quality-time/issues/10877).
 - Automatically expand long comments when exporting to PDF. Fixes [#10892](https://github.com/ICTU/quality-time/issues/10892).