diff --git a/pyrit/cli/_cli_args.py b/pyrit/cli/_cli_args.py
index 1218ba4dc3..891ca7dea3 100644
--- a/pyrit/cli/_cli_args.py
+++ b/pyrit/cli/_cli_args.py
@@ -621,7 +621,7 @@ def parse_run_arguments(*, args_string: str, declared_params: list[Parameter] |
     augmented_specs: list[_ArgSpec] = list(_RUN_ARG_SPECS)
     if declared_params:
         scenario_specs = [_arg_spec_from_parameter(param=p) for p in declared_params]
-        _validate_scenario_flag_collisions(scenario_specs=scenario_specs, base_specs=_RUN_ARG_SPECS)
+        scenario_specs = _resolve_scenario_flag_collisions(scenario_specs=scenario_specs, base_specs=_RUN_ARG_SPECS)
         augmented_specs.extend(scenario_specs)
 
     result = _parse_shell_arguments(parts=parts[1:], arg_specs=augmented_specs)
@@ -707,29 +707,44 @@ def parser(raw: str) -> Any:
     )
 
 
-def _validate_scenario_flag_collisions(*, scenario_specs: list[_ArgSpec], base_specs: list[_ArgSpec]) -> None:
+def _resolve_scenario_flag_collisions(*, scenario_specs: list[_ArgSpec], base_specs: list[_ArgSpec]) -> list[_ArgSpec]:
     """
-    Reject scenario-vs-built-in and scenario-vs-scenario flag collisions.
+    Drop scenario specs that collide with a built-in flag; reject scenario-vs-scenario collisions.
+
+    A scenario's ``supported_parameters`` (fetched from the API) include the framework's common
+    parameters — e.g. ``memory_labels``, ``max_concurrency``, ``max_retries`` — which normalize to
+    flags already provided as built-ins. Those built-ins own the flag, so the scenario copy is
+    silently dropped, mirroring ``pyrit_scan._add_scenario_params_from_api``. A genuine
+    scenario-vs-scenario collision (two declared params normalizing to the same flag) is still a
+    scenario bug, so it raises.
+
+    Args:
+        scenario_specs: Specs built from scenario-declared parameters.
+        base_specs: Built-in run argument specs.
+
+    Returns:
+        list[_ArgSpec]: The scenario specs whose flags do not collide with a built-in flag.
 
     Raises:
-        ValueError: If a scenario flag duplicates a built-in flag, or two
-            scenario parameters normalize to the same CLI flag.
+        ValueError: If two scenario parameters normalize to the same CLI flag.
     """
     base_flags = {flag for spec in base_specs for flag in spec.flags}
+    resolved: list[_ArgSpec] = []
     seen: set[str] = set()
     for spec in scenario_specs:
+        # Scenario specs carry a single flag, but guard defensively in case that changes.
+        if any(flag in base_flags for flag in spec.flags):
+            # Common framework parameter already handled by the matching built-in flag.
+            continue
         for flag in spec.flags:
-            if flag in base_flags:
-                raise ValueError(
-                    f"Scenario parameter flag {flag!r} collides with a built-in flag. "
-                    f"Rename the parameter to avoid the collision."
-                )
             if flag in seen:
                 raise ValueError(
                     f"Scenario declares two parameters that normalize to the same CLI flag {flag!r}. "
                     f"Rename one of them."
                 )
             seen.add(flag)
+        resolved.append(spec)
+    return resolved
 
 
 def extract_scenario_args(*, parsed: dict[str, Any]) -> dict[str, Any]:
diff --git a/tests/unit/cli/test_cli_args.py b/tests/unit/cli/test_cli_args.py
index c8e2cab090..8224675b87 100644
--- a/tests/unit/cli/test_cli_args.py
+++ b/tests/unit/cli/test_cli_args.py
@@ -3,7 +3,22 @@
 
 import pytest
 
-from pyrit.cli._cli_args import _argparse_validator
+from pyrit.cli._cli_args import _argparse_validator, parse_run_arguments
+from pyrit.models import Parameter
+
+
+def _sp(*, name: str, description: str = "", param_type: str = "str") -> Parameter:
+    """Build a real Parameter from Summary-style kwargs (param_type as a string)."""
+    return Parameter.model_validate(
+        {
+            "name": name,
+            "description": description,
+            "default": None,
+            "type_name": param_type,
+            "choices": None,
+            "is_list": False,
+        }
+    )
 
 
 def test_argparse_validator_no_params_raises():
@@ -23,3 +38,38 @@ def validate_name(*, name: str) -> str:
 
     wrapped = _argparse_validator(validate_name)
     assert wrapped("hello") == "HELLO"
+
+
+def test_parse_run_arguments_skips_scenario_params_colliding_with_builtins():
+    """
+    Scenario ``supported_parameters`` include framework common params (e.g. memory_labels)
+    whose flags match built-ins. Those must be silently dropped, not raise, so ``run`` works.
+    """
+    declared_params = [
+        _sp(name="memory_labels", description="Common framework param."),
+        _sp(name="max_concurrency", description="Common framework param.", param_type="int"),
+        _sp(name="max_turns", description="Scenario custom param.", param_type="int"),
+    ]
+
+    result = parse_run_arguments(
+        args_string="airt.scam --target openai_chat --max-turns 3",
+        declared_params=declared_params,
+    )
+
+    assert result["scenario_name"] == "airt.scam"
+    assert result["target"] == "openai_chat"
+    # The dropped common params keep their built-in result keys (not scenario__-prefixed).
+    assert result["scenario__max_turns"] == 3
+    assert "scenario__memory_labels" not in result
+    assert "scenario__max_concurrency" not in result
+
+
+def test_parse_run_arguments_raises_on_scenario_vs_scenario_collision():
+    """Two scenario params normalizing to the same CLI flag remain a scenario bug and raise."""
+    declared_params = [
+        _sp(name="max_turns", description="First."),
+        _sp(name="max-turns", description="Normalizes to the same flag."),
+    ]
+
+    with pytest.raises(ValueError, match="normalize to the same CLI flag"):
+        parse_run_arguments(args_string="airt.scam", declared_params=declared_params)