diff --git a/docs/requests.md b/docs/requests.md
index f0ffc66..a72cb75 100644
--- a/docs/requests.md
+++ b/docs/requests.md
@@ -73,6 +73,8 @@ Cookies are exposed as a regular dictionary interface.
 
 For example: `request.cookies.get('mycookie')`
 
+Cookies are ignored in case of an invalid cookie. (RFC2109)
+
 #### Body
 
 There are a few different interfaces for returning the body of the request:
diff --git a/starlette/requests.py b/starlette/requests.py
index 1f7b09e..0ebeb3f 100644
--- a/starlette/requests.py
+++ b/starlette/requests.py
@@ -91,7 +91,10 @@ class HTTPConnection(Mapping):
             cookie_header = self.headers.get("cookie")
             if cookie_header:
                 cookie = http.cookies.SimpleCookie()  # type: http.cookies.BaseCookie
-                cookie.load(cookie_header)
+                try:
+                    cookie.load(cookie_header)
+                except http.cookies.CookieError:
+                    pass
                 for key, morsel in cookie.items():
                     cookies[key] = morsel.value
             self._cookies = cookies

[bug] Invalid cookie name leads to exception
When handling a request with an invalid cookie name (does not conform to RFC2109) starlette raises an exception. i.e iam/cookiename
This is because Starlette uses Python's stdlib cookie library, which is very strict.
I do understand the strictness, but in real life scenarios you receive such malformed cookies and I want to handle those requests.
My suggestion for a solution would be to catch those exceptions and ignore the invalid cookie. 
** EDIT **
I just realized stdlib is used for the whole cookie header, hence can't ignore only one cookie.
I'll create a PR for ignoring the whole cookie on such case, but maybe we should create our own Cookie/Morsel class and override the methods to ignore such error in the inbound case?
diff --git a/tests/test_requests.py b/tests/test_requests.py
index defdf3a..3381249 100644
--- a/tests/test_requests.py
+++ b/tests/test_requests.py
@@ -285,6 +285,17 @@ def test_request_cookies():
     assert response.text == "Hello, cookies!"
 
 
+def test_invalid_cookie():
+    async def app(scope, receive, send):
+        request = Request(scope, receive)
+        response = JSONResponse({"cookies": request.cookies})
+        await response(scope, receive, send)
+
+    client = TestClient(app)
+    response = client.get("/", cookies={"invalid/cookie": "test", "valid": "test2"})
+    assert response.json() == {"cookies": {}}
+
+
 def test_chunked_encoding():
     async def app(scope, receive, send):
         request = Request(scope, receive)

pip install -e .[full]
parse_log_pytest
requirements.txt
pytest pytest-cov autoflake black isort mypy databases[sqlite]
apt-get update apt-get install -y gcc
3.9
requirements.txt
pytest --no-header -rA --tb=line --color=no -p no:cacheprovider -W ignore::DeprecationWarning
aiofiles==24.1.0
aiosqlite==0.21.0
autoflake==2.3.1
babel==2.17.0
backrefs==5.8
black==25.1.0
certifi==2025.1.31
charset-normalizer==3.4.1
click==8.1.8
colorama==0.4.6
coverage==7.8.0
databases==0.9.0
exceptiongroup==1.2.2
ghp-import==2.1.0
graphene==3.4.3
graphql-core==3.2.6
graphql-relay==3.2.0
greenlet==3.1.1
idna==3.10
importlib_metadata==8.6.1
iniconfig==2.1.0
isort==6.0.1
itsdangerous==2.2.0
Jinja2==3.1.6
Markdown==3.7
MarkupSafe==3.0.2
mergedeep==1.3.4
mkautodoc==0.2.0
mkdocs==1.6.1
mkdocs-get-deps==0.2.0
mkdocs-material==9.6.10
mkdocs-material-extensions==1.3.1
mypy==1.15.0
mypy-extensions==1.0.0
packaging==24.2
paginate==0.5.7
pathspec==0.12.1
platformdirs==4.3.7
pluggy==1.5.0
pyflakes==3.3.2
Pygments==2.19.1
pymdown-extensions==10.14.3
pytest==8.3.5
pytest-cov==6.0.0
python-dateutil==2.9.0.post0
python-multipart==0.0.20
PyYAML==6.0.2
pyyaml_env_tag==0.1
requests==2.32.3
six==1.17.0
SQLAlchemy==2.0.40
-e git+https://github.com/encode/starlette.git@0cb2d909a2a6d21219c66f8eec75a95f4b6d1c53#egg=starlette
tomli==2.2.1
typing_extensions==4.13.0
ujson==5.10.0
urllib3==2.3.0
watchdog==6.0.0
zipp==3.21.0

name: starlette
channels:
  - defaults
  - https://repo.anaconda.com/pkgs/main
  - https://repo.anaconda.com/pkgs/r
  - conda-forge
dependencies:
  - _libgcc_mutex=0.1=main
  - _openmp_mutex=5.1=1_gnu
  - ca-certificates=2025.2.25=h06a4308_0
  - ld_impl_linux-64=2.40=h12ee557_0
  - libffi=3.4.4=h6a678d5_1
  - libgcc-ng=11.2.0=h1234567_1
  - libgomp=11.2.0=h1234567_1
  - libstdcxx-ng=11.2.0=h1234567_1
  - ncurses=6.4=h6a678d5_0
  - openssl=3.0.16=h5eee18b_0
  - pip=25.0=py39h06a4308_0
  - python=3.9.21=he870216_1
  - readline=8.2=h5eee18b_0
  - setuptools=75.8.0=py39h06a4308_0
  - sqlite=3.45.3=h5eee18b_0
  - tk=8.6.14=h39e8969_0
  - tzdata=2025a=h04d1e81_0
  - wheel=0.45.1=py39h06a4308_0
  - xz=5.6.4=h5eee18b_1
  - zlib=1.2.13=h5eee18b_1
  - pip:
      - aiofiles==24.1.0
      - aiosqlite==0.21.0
      - autoflake==2.3.1
      - babel==2.17.0
      - backrefs==5.8
      - black==25.1.0
      - certifi==2025.1.31
      - charset-normalizer==3.4.1
      - click==8.1.8
      - colorama==0.4.6
      - coverage==7.8.0
      - databases==0.9.0
      - exceptiongroup==1.2.2
      - ghp-import==2.1.0
      - graphene==3.4.3
      - graphql-core==3.2.6
      - graphql-relay==3.2.0
      - greenlet==3.1.1
      - idna==3.10
      - importlib-metadata==8.6.1
      - iniconfig==2.1.0
      - isort==6.0.1
      - itsdangerous==2.2.0
      - jinja2==3.1.6
      - markdown==3.7
      - markupsafe==3.0.2
      - mergedeep==1.3.4
      - mkautodoc==0.2.0
      - mkdocs==1.6.1
      - mkdocs-get-deps==0.2.0
      - mkdocs-material==9.6.10
      - mkdocs-material-extensions==1.3.1
      - mypy==1.15.0
      - mypy-extensions==1.0.0
      - packaging==24.2
      - paginate==0.5.7
      - pathspec==0.12.1
      - platformdirs==4.3.7
      - pluggy==1.5.0
      - pyflakes==3.3.2
      - pygments==2.19.1
      - pymdown-extensions==10.14.3
      - pytest==8.3.5
      - pytest-cov==6.0.0
      - python-dateutil==2.9.0.post0
      - python-multipart==0.0.20
      - pyyaml==6.0.2
      - pyyaml-env-tag==0.1
      - requests==2.32.3
      - six==1.17.0
      - sqlalchemy==2.0.40
      - tomli==2.2.1
      - typing-extensions==4.13.0
      - ujson==5.10.0
      - urllib3==2.3.0
      - watchdog==6.0.0
      - zipp==3.21.0
prefix: /opt/conda/envs/starlette

tests/test_requests.py::test_invalid_cookie
tests/test_requests.py::test_request_url tests/test_requests.py::test_request_query_params tests/test_requests.py::test_request_headers tests/test_requests.py::test_request_client tests/test_requests.py::test_request_body tests/test_requests.py::test_request_stream tests/test_requests.py::test_request_form_urlencoded tests/test_requests.py::test_request_body_then_stream tests/test_requests.py::test_request_stream_then_body tests/test_requests.py::test_request_json tests/test_requests.py::test_request_scope_interface tests/test_requests.py::test_request_without_setting_receive tests/test_requests.py::test_request_disconnect tests/test_requests.py::test_request_is_disconnected tests/test_requests.py::test_request_state_object tests/test_requests.py::test_request_state tests/test_requests.py::test_request_cookies tests/test_requests.py::test_chunked_encoding tests/test_requests.py::test_request_send_push_promise tests/test_requests.py::test_request_send_push_promise_without_push_extension tests/test_requests.py::test_request_send_push_promise_without_setting_send
docs/requests.md starlette/requests.py
docs/requests.md starlette/requests.py