diff --git a/sentry_sdk/integrations/_wsgi_common.py b/sentry_sdk/integrations/_wsgi_common.py
index 21f7ba1a6e..ab61b738b6 100644
--- a/sentry_sdk/integrations/_wsgi_common.py
+++ b/sentry_sdk/integrations/_wsgi_common.py
@@ -1,4 +1,5 @@
 import json
+from copy import deepcopy
 
 from sentry_sdk.hub import Hub, _should_send_default_pii
 from sentry_sdk.utils import AnnotatedValue
@@ -77,7 +78,7 @@ def extract_into_event(self, event):
         if data is not None:
             request_info["data"] = data
 
-        event["request"] = request_info
+        event["request"] = deepcopy(request_info)
 
     def content_length(self):
         # type: () -> int
diff --git a/sentry_sdk/integrations/asgi.py b/sentry_sdk/integrations/asgi.py
index 6fd4026ada..e48fe0ae29 100644
--- a/sentry_sdk/integrations/asgi.py
+++ b/sentry_sdk/integrations/asgi.py
@@ -7,6 +7,7 @@
 import asyncio
 import inspect
 import urllib
+from copy import deepcopy
 
 from sentry_sdk._functools import partial
 from sentry_sdk._types import TYPE_CHECKING
@@ -211,7 +212,7 @@ def event_processor(self, event, hint, asgi_scope):
 
         self._set_transaction_name_and_source(event, self.transaction_style, asgi_scope)
 
-        event["request"] = request_info
+        event["request"] = deepcopy(request_info)
 
         return event
 
diff --git a/sentry_sdk/integrations/aws_lambda.py b/sentry_sdk/integrations/aws_lambda.py
index 1f511b99b0..46efaf913d 100644
--- a/sentry_sdk/integrations/aws_lambda.py
+++ b/sentry_sdk/integrations/aws_lambda.py
@@ -1,8 +1,9 @@
+import sys
+from copy import deepcopy
 from datetime import datetime, timedelta
 from os import environ
-import sys
-from sentry_sdk.consts import OP
 
+from sentry_sdk.consts import OP
 from sentry_sdk.hub import Hub, _should_send_default_pii
 from sentry_sdk.tracing import TRANSACTION_SOURCE_COMPONENT, Transaction
 from sentry_sdk._compat import reraise
@@ -380,7 +381,7 @@ def event_processor(sentry_event, hint, start_time=start_time):
                 # event. Meaning every body is unstructured to us.
                 request["data"] = AnnotatedValue.removed_because_raw_data()
 
-        sentry_event["request"] = request
+        sentry_event["request"] = deepcopy(request)
 
         return sentry_event
 
diff --git a/sentry_sdk/integrations/fastapi.py b/sentry_sdk/integrations/fastapi.py
index d43825e1b2..17e0576c18 100644
--- a/sentry_sdk/integrations/fastapi.py
+++ b/sentry_sdk/integrations/fastapi.py
@@ -1,4 +1,5 @@
 import asyncio
+from copy import deepcopy
 
 from sentry_sdk._types import TYPE_CHECKING
 from sentry_sdk.hub import Hub, _should_send_default_pii
@@ -116,7 +117,7 @@ def event_processor(event, hint):
                                 request_info["cookies"] = info["cookies"]
                             if "data" in info:
                                 request_info["data"] = info["data"]
-                        event["request"] = request_info
+                        event["request"] = deepcopy(request_info)
 
                         return event
 
diff --git a/sentry_sdk/integrations/gcp.py b/sentry_sdk/integrations/gcp.py
index 5ecb26af15..fc751ef139 100644
--- a/sentry_sdk/integrations/gcp.py
+++ b/sentry_sdk/integrations/gcp.py
@@ -1,8 +1,9 @@
+import sys
+from copy import deepcopy
 from datetime import datetime, timedelta
 from os import environ
-import sys
-from sentry_sdk.consts import OP
 
+from sentry_sdk.consts import OP
 from sentry_sdk.hub import Hub, _should_send_default_pii
 from sentry_sdk.tracing import TRANSACTION_SOURCE_COMPONENT, Transaction
 from sentry_sdk._compat import reraise
@@ -193,7 +194,7 @@ def event_processor(event, hint):
                 # event. Meaning every body is unstructured to us.
                 request["data"] = AnnotatedValue.removed_because_raw_data()
 
-        event["request"] = request
+        event["request"] = deepcopy(request)
 
         return event
 
diff --git a/sentry_sdk/integrations/starlette.py b/sentry_sdk/integrations/starlette.py
index 8e6e3eddba..69b6fcc618 100644
--- a/sentry_sdk/integrations/starlette.py
+++ b/sentry_sdk/integrations/starlette.py
@@ -2,6 +2,7 @@
 
 import asyncio
 import functools
+from copy import deepcopy
 
 from sentry_sdk._compat import iteritems
 from sentry_sdk._types import TYPE_CHECKING
@@ -389,7 +390,7 @@ def event_processor(event, hint):
                                     request_info["cookies"] = info["cookies"]
                                 if "data" in info:
                                     request_info["data"] = info["data"]
-                            event["request"] = request_info
+                            event["request"] = deepcopy(request_info)
 
                             return event
 
@@ -435,7 +436,7 @@ def event_processor(event, hint):
                             if cookies:
                                 request_info["cookies"] = cookies
 
-                            event["request"] = request_info
+                            event["request"] = deepcopy(request_info)
 
                             return event
 
diff --git a/sentry_sdk/utils.py b/sentry_sdk/utils.py
index ddbc329932..4e557578e4 100644
--- a/sentry_sdk/utils.py
+++ b/sentry_sdk/utils.py
@@ -10,6 +10,7 @@
 import threading
 import time
 from collections import namedtuple
+from copy import copy
 from decimal import Decimal
 from numbers import Real
 
@@ -627,7 +628,7 @@ def serialize_frame(
         )
 
     if include_local_variables:
-        rv["vars"] = frame.f_locals
+        rv["vars"] = copy(frame.f_locals)
 
     return rv
 
diff --git a/tests/integrations/fastapi/test_fastapi.py b/tests/integrations/fastapi/test_fastapi.py
index 17b1cecd52..86e7a612d8 100644
--- a/tests/integrations/fastapi/test_fastapi.py
+++ b/tests/integrations/fastapi/test_fastapi.py
@@ -1,4 +1,5 @@
 import json
+import logging
 import threading
 
 import pytest
@@ -6,7 +7,7 @@
 
 fastapi = pytest.importorskip("fastapi")
 
-from fastapi import FastAPI
+from fastapi import FastAPI, Request
 from fastapi.testclient import TestClient
 from sentry_sdk import capture_message
 from sentry_sdk.integrations.starlette import StarletteIntegration
@@ -187,3 +188,33 @@ def test_active_thread_id(sentry_init, capture_envelopes, teardown_profiling, en
         transactions = profile.payload.json["transactions"]
         assert len(transactions) == 1
         assert str(data["active"]) == transactions[0]["active_thread_id"]
+
+
+@pytest.mark.asyncio
+async def test_original_request_not_scrubbed(sentry_init, capture_events):
+    sentry_init(
+        integrations=[StarletteIntegration(), FastApiIntegration()],
+        traces_sample_rate=1.0,
+        debug=True,
+    )
+
+    app = FastAPI()
+
+    @app.post("/error")
+    async def _error(request: Request):
+        logging.critical("Oh no!")
+        assert request.headers["Authorization"] == "Bearer ohno"
+        assert await request.json() == {"password": "secret"}
+
+        return {"error": "Oh no!"}
+
+    events = capture_events()
+
+    client = TestClient(app)
+    client.post(
+        "/error", json={"password": "secret"}, headers={"Authorization": "Bearer ohno"}
+    )
+
+    event = events[0]
+    assert event["request"]["data"] == {"password": "[Filtered]"}
+    assert event["request"]["headers"]["authorization"] == "[Filtered]"
diff --git a/tests/integrations/flask/test_flask.py b/tests/integrations/flask/test_flask.py
index b5ac498dd6..0baeb8c21d 100644
--- a/tests/integrations/flask/test_flask.py
+++ b/tests/integrations/flask/test_flask.py
@@ -816,3 +816,26 @@ def index():
         response = client.get("/")
         assert response.status_code == 200
         assert response.data == b"hi"
+
+
+def test_request_not_modified_by_reference(sentry_init, capture_events, app):
+    sentry_init(integrations=[flask_sentry.FlaskIntegration()])
+
+    @app.route("/", methods=["POST"])
+    def index():
+        logging.critical("oops")
+        assert request.get_json() == {"password": "ohno"}
+        assert request.headers["Authorization"] == "Bearer ohno"
+        return "ok"
+
+    events = capture_events()
+
+    client = app.test_client()
+    client.post(
+        "/", json={"password": "ohno"}, headers={"Authorization": "Bearer ohno"}
+    )
+
+    (event,) = events
+
+    assert event["request"]["data"]["password"] == "[Filtered]"
+    assert event["request"]["headers"]["Authorization"] == "[Filtered]"
diff --git a/tests/integrations/starlette/test_starlette.py b/tests/integrations/starlette/test_starlette.py
index 03cb270049..77ff368e47 100644
--- a/tests/integrations/starlette/test_starlette.py
+++ b/tests/integrations/starlette/test_starlette.py
@@ -2,6 +2,7 @@
 import base64
 import functools
 import json
+import logging
 import os
 import threading
 
@@ -873,3 +874,32 @@ def test_active_thread_id(sentry_init, capture_envelopes, teardown_profiling, en
         transactions = profile.payload.json["transactions"]
         assert len(transactions) == 1
         assert str(data["active"]) == transactions[0]["active_thread_id"]
+
+
+def test_original_request_not_scrubbed(sentry_init, capture_events):
+    sentry_init(integrations=[StarletteIntegration()])
+
+    events = capture_events()
+
+    async def _error(request):
+        logging.critical("Oh no!")
+        assert request.headers["Authorization"] == "Bearer ohno"
+        assert await request.json() == {"password": "ohno"}
+        return starlette.responses.JSONResponse({"status": "Oh no!"})
+
+    app = starlette.applications.Starlette(
+        routes=[
+            starlette.routing.Route("/error", _error, methods=["POST"]),
+        ],
+    )
+
+    client = TestClient(app)
+    client.post(
+        "/error",
+        json={"password": "ohno"},
+        headers={"Authorization": "Bearer ohno"},
+    )
+
+    event = events[0]
+    assert event["request"]["data"] == {"password": "[Filtered]"}
+    assert event["request"]["headers"]["authorization"] == "[Filtered]"
diff --git a/tests/test_scrubber.py b/tests/test_scrubber.py
index d76e5a7fc1..5bb89ed654 100644
--- a/tests/test_scrubber.py
+++ b/tests/test_scrubber.py
@@ -153,3 +153,21 @@ def test_custom_denylist(sentry_init, capture_events):
     assert meta == {
         "my_sensitive_var": {"": {"rem": [["!config", "s"]]}},
     }
+
+
+def test_scrubbing_doesnt_affect_local_vars(sentry_init, capture_events):
+    sentry_init()
+    events = capture_events()
+
+    try:
+        password = "cat123"
+        1 / 0
+    except ZeroDivisionError:
+        capture_exception()
+
+    (event,) = events
+
+    frames = event["exception"]["values"][0]["stacktrace"]["frames"]
+    (frame,) = frames
+    assert frame["vars"]["password"] == "[Filtered]"
+    assert password == "cat123"