diff --git a/src/fortune_intel/connectors/workday.py b/src/fortune_intel/connectors/workday.py
index 685310b..eb38db0 100644
--- a/src/fortune_intel/connectors/workday.py
+++ b/src/fortune_intel/connectors/workday.py
@@ -403,6 +403,7 @@ def _public_job_url(self, value: object) -> str:
             ).casefold()
         )
         allowed_host = external_host == self.workday.host or canonical_public_alias
+        strict_public_route = self.workday.uses_recruiting_path or canonical_public_alias
         if (
             parsed.scheme != "https"
             or not allowed_host
@@ -417,7 +418,7 @@ def _public_job_url(self, value: object) -> str:
             )
             or unsafe_path
             or (
-                self.workday.uses_recruiting_path
+                strict_public_route
                 and (
                     parsed.port is not None
                     or parsed.query
diff --git a/tests/test_workday_connector.py b/tests/test_workday_connector.py
index 09762e0..d49ba3a 100644
--- a/tests/test_workday_connector.py
+++ b/tests/test_workday_connector.py
@@ -128,6 +128,25 @@ def test_accepts_workday_canonical_public_alias_for_same_tenant_and_site():
     )
 
 
+@pytest.mark.parametrize(
+    "suffix",
+    ["?source=aggregator", "#apply", "?", "#", "/../private"],
+)
+def test_rejects_ambiguous_canonical_public_aliases(suffix):
+    detail = workday_detail("JR-1")
+    detail["jobPostingInfo"]["externalUrl"] = (
+        f"https://wd5.myworkdaysite.com/recruiting/acme/External/job/US-NY/Role-JR-1_JR-1{suffix}"
+    )
+    client = StubClient([{"total": 1, "jobPostings": [workday_summary("JR-1")]}, detail])
+    key = workday_source("acme.wd5.myworkdayjobs.com", "acme", "External").key
+
+    result = WorkdayConnector(key, client=client).fetch()
+
+    assert result.complete is False
+    assert result.jobs == ()
+    assert "configured Workday site" in result.errors[0].message
+
+
 def test_accepts_case_variant_of_same_workday_site_path():
     """Workday can capitalize a site path differently from its board URL."""