diff --git a/.github/workflows/agent-scan.yml b/.github/workflows/agent-scan.yml
new file mode 100644
index 00000000000..1717ebbfef5
--- /dev/null
+++ b/.github/workflows/agent-scan.yml
@@ -0,0 +1,18 @@
+name: AgentScan
+
+on:
+  pull_request_target:
+    types:
+      - opened
+      - reopened
+
+jobs:
+  agentscan:
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    steps:
+      - name: AgentScan
+        uses: MatteoGabriele/agentscan-action@v2.5.0
+        with:
+          mode: labels
diff --git a/CHANGES/13462.bugfix.rst b/CHANGES/13462.bugfix.rst
new file mode 100644
index 00000000000..a4c08a20c5f
--- /dev/null
+++ b/CHANGES/13462.bugfix.rst
@@ -0,0 +1 @@
+Fixed multipart not returning 415 when decoding failed -- by :user:`dxbjavid`.
diff --git a/CHANGES/13580.bugfix.rst b/CHANGES/13580.bugfix.rst
new file mode 100644
index 00000000000..62406696f14
--- /dev/null
+++ b/CHANGES/13580.bugfix.rst
@@ -0,0 +1 @@
+Fixed ``BaseRequest.http_range`` not accepting case-insensitive range units -- by :user:`Manny7717`.
diff --git a/CHANGES/13581.bugfix.rst b/CHANGES/13581.bugfix.rst
new file mode 120000
index 00000000000..402ff87b6a1
--- /dev/null
+++ b/CHANGES/13581.bugfix.rst
@@ -0,0 +1 @@
+13580.bugfix.rst
\ No newline at end of file
diff --git a/CONTRIBUTORS.txt b/CONTRIBUTORS.txt
index 3748922ee71..5e8f0e74486 100644
--- a/CONTRIBUTORS.txt
+++ b/CONTRIBUTORS.txt
@@ -258,6 +258,7 @@ Lukasz Marcin Dobrzanski
 Lukshya Supyal
 Lénárd Szolnoki
 Makc Belousow
+Manny7717
 Manuel Miranda
 Marat Sharafutdinov
 Marc Mueller
diff --git a/aiohttp/web_request.py b/aiohttp/web_request.py
index 5f426d743c7..08c53b21e99 100644
--- a/aiohttp/web_request.py
+++ b/aiohttp/web_request.py
@@ -641,7 +641,8 @@ def http_range(self) -> "slice[int, int, int]":
         if rng is not None:
             try:
                 pattern = r"^bytes=(\d*)-(\d*)$"
-                start, end = re.findall(pattern, rng, re.ASCII)[0]
+                # https://www.rfc-editor.org/info/rfc9110/#section-14.1-4
+                start, end = re.findall(pattern, rng, re.ASCII | re.IGNORECASE)[0]
             except IndexError:  # pattern was not found in header
                 raise ValueError("range not in acceptable format")
 
@@ -847,7 +848,11 @@ async def post(self) -> "MultiDictProxy[str | bytes | FileField]":
 
                         if field_ct is None or field_ct.startswith("text/"):
                             charset = field.get_charset(default="utf-8")
-                            out.add(field.name, value.decode(charset))
+                            try:
+                                decoded = value.decode(charset)
+                            except (LookupError, UnicodeDecodeError):
+                                raise HTTPUnsupportedMediaType()
+                            out.add(field.name, decoded)
                         else:
                             out.add(field.name, value)  # type: ignore[arg-type]
                 else:
diff --git a/tests/test_web_request.py b/tests/test_web_request.py
index d1b6f553a99..41e71c5e76b 100644
--- a/tests/test_web_request.py
+++ b/tests/test_web_request.py
@@ -316,6 +316,15 @@ def test_range_non_ascii() -> None:
         req.http_range
 
 
+def test_range_to_slice_uppercase_unit() -> None:
+    # https://www.rfc-editor.org/info/rfc9110/#section-14.1-4
+    req = make_mocked_request(
+        "GET", "/", headers=CIMultiDict([("RANGE", "Bytes=0-499")])
+    )
+    assert isinstance(req.http_range, slice)
+    assert req.http_range.start == 0 and req.http_range.stop == 500
+
+
 def test_non_keepalive_on_http10() -> None:
     req = make_mocked_request("GET", "/", version=HttpVersion(1, 0))
     assert not req.keep_alive
@@ -1045,6 +1054,36 @@ async def test_multipart_formdata(protocol: BaseProtocol) -> None:
     assert dict(result) == {"a": "b", "c": "d"}
 
 
+@pytest.mark.parametrize(
+    ("part_charset", "part_body"),
+    (
+        ("not-a-real-codec", b"hello"),
+        ("utf-8", b"\xff\xfe"),
+    ),
+)
+async def test_multipart_formdata_field_bad_charset(
+    protocol: BaseProtocol, part_charset: str, part_body: bytes
+) -> None:
+    payload = StreamReader(protocol, 2**16, loop=asyncio.get_running_loop())
+    payload.feed_data(
+        b"-----------------------------326931944431359\r\n"
+        b'Content-Disposition: form-data; name="a"\r\n'
+        b"Content-Type: text/plain; charset=" + part_charset.encode() + b"\r\n"
+        b"\r\n" + part_body + b"\r\n"
+        b"-----------------------------326931944431359--\r\n"
+    )
+    content_type = (
+        "multipart/form-data; boundary=---------------------------326931944431359"
+    )
+    payload.feed_eof()
+    req = make_mocked_request(
+        "POST", "/", headers={"CONTENT-TYPE": content_type}, payload=payload
+    )
+    with pytest.raises(web.HTTPUnsupportedMediaType) as err:
+        await req.post()
+    assert err.value.status_code == 415
+
+
 async def test_urlencoded_form_with_invalid_default_encoding(
     protocol: BaseProtocol,
 ) -> None: