diff --git a/packages/hflow-server/tests/test_server_runtime.py b/packages/hflow-server/tests/test_server_runtime.py
index 4a99634..320b915 100644
--- a/packages/hflow-server/tests/test_server_runtime.py
+++ b/packages/hflow-server/tests/test_server_runtime.py
@@ -344,7 +344,15 @@ def test_ingest_rejects_absolute_and_escaping_uris_before_any_runtime(
     data_root = tmp_path / "bare-root"
     data_root.mkdir()
     client = _client_over(data_root, unbuilt_assets_dir)
-    for hostile_uri in ("/etc/passwd", "../../etc/shadow", "sub/../../escape.mcap"):
+    for hostile_uri in (
+        ".",
+        "./",
+        "a/..",
+        "a/b/../..",
+        "/etc/passwd",
+        "../../etc/shadow",
+        "sub/../../escape.mcap",
+    ):
         response = client.post(
             "/api/v1/runtime/ingest",
             json={"uris": [hostile_uri], "profile": "full", "mode": "batch"},
diff --git a/src/hflow/uri.py b/src/hflow/uri.py
index 3e75933..c38d3c1 100644
--- a/src/hflow/uri.py
+++ b/src/hflow/uri.py
@@ -30,7 +30,7 @@ def parse_data_root_relative_uri(uri: str) -> DataRootRelativeUri:
 
     # Preserve the candidate itself; normalize only this containment check.
     normalized = normpath(candidate)
-    if normalized == ".." or normalized.startswith("../"):
+    if normalized == "." or normalized == ".." or normalized.startswith("../"):
         raise ValueError(f"{candidate!r} is not relative to the data root")
 
     return DataRootRelativeUri(candidate)
diff --git a/tests/test_runtime_cli.py b/tests/test_runtime_cli.py
index 9191287..bd2ef82 100644
--- a/tests/test_runtime_cli.py
+++ b/tests/test_runtime_cli.py
@@ -916,7 +916,7 @@ def test_ingest_rejects_unknown_profile(pipeline_file: Path, tmp_path: Path) ->
     assert exit_info.value.code == 2
 
 
-@pytest.mark.parametrize("uri", ["/abs/x.mcap", "../x.mcap"])
+@pytest.mark.parametrize("uri", [".", "./", "a/..", "a/b/../..", "/abs/x.mcap", "../x.mcap"])
 def test_ingest_rejects_uris_outside_data_root(
     uri: str,
     pipeline_file: Path,
diff --git a/tests/test_runtime_client.py b/tests/test_runtime_client.py
index 1cedec4..80113a2 100644
--- a/tests/test_runtime_client.py
+++ b/tests/test_runtime_client.py
@@ -376,6 +376,10 @@ def test_ingest_refuses_a_batch_count_the_run_could_not_honour(stub_server: str)
     "uri",
     [
         "   ",
+        ".",
+        "./",
+        "a/..",
+        "a/b/../..",
         "/etc/passwd",
         "../outside.mcap",
         r"\episodes-in\a.mcap",