diff --git a/pyproject.toml b/pyproject.toml
index f3f102b1d..6f565363e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -83,7 +83,7 @@ edge-tts = ["edge-tts==7.2.7"]
 modal = ["modal==1.3.4"]
 daytona = ["daytona==0.155.0"]
 hindsight = ["hindsight-client==0.6.1"]
-dev = ["debugpy==1.8.20", "pytest==9.0.2", "pytest-asyncio==1.3.0", "pytest-timeout==2.4.0", "mcp==1.26.0", "ty==0.0.21", "ruff==0.15.10", "setuptools==82.0.1"]
+dev = ["debugpy==1.8.20", "pytest==9.0.2", "pytest-asyncio==1.3.0", "pytest-timeout==2.4.0", "mcp==1.26.0", "starlette==1.0.1", "ty==0.0.21", "ruff==0.15.10", "setuptools==82.0.1"]  # starlette: CVE-2026-48710
 messaging = ["python-telegram-bot[webhooks]==22.6", "discord.py[voice]==2.7.1", "aiohttp==3.13.3", "brotlicffi==1.2.0.1", "slack-bolt==1.27.0", "slack-sdk==3.40.1", "qrcode==7.4.2"]
 cron = []  # croniter is now a core dependency; this extra kept for back-compat
 slack = ["slack-bolt==1.27.0", "slack-sdk==3.40.1", "aiohttp==3.13.3"]
@@ -108,14 +108,21 @@ pty = [
   "pywinpty==2.0.15; sys_platform == 'win32'",
 ]
 honcho = ["honcho-ai==2.0.1"]
-mcp = ["mcp==1.26.0"]
+# CVE-2026-48710 (BadHost): Starlette is pulled transitively by mcp's
+# sse-starlette / HTTP-SSE stack (and by fastapi in the `web` extra). Before
+# 1.0.1, a malformed Host header makes `request.url.path` desync from the path
+# the ASGI router actually dispatched, so middleware/endpoints that gate on
+# `request.url` can be bypassed. We pin a patched Starlette directly in every
+# extra that exposes a Starlette-backed server surface so pip/uv can't resolve
+# a vulnerable pre-1.0.1 transitive. Bump in lockstep with uv.lock.
+mcp = ["mcp==1.26.0", "starlette==1.0.1"]  # starlette: CVE-2026-48710
 homeassistant = ["aiohttp==3.13.3"]
 sms = ["aiohttp==3.13.3"]
 # Computer use — macOS background desktop control via cua-driver (MCP stdio).
 # The cua-driver binary itself is installed via `hermes tools` post-setup
 # (curl install script); this extra just pins the MCP client used to talk
 # to it, which is already provided by the `mcp` extra.
-computer-use = ["mcp==1.26.0"]
+computer-use = ["mcp==1.26.0", "starlette==1.0.1"]  # starlette: CVE-2026-48710
 acp = ["agent-client-protocol==0.9.0"]
 # mistral: Voxtral STT + TTS. Pinned to an exact verified-clean version.
 # The `mistralai` PyPI project was quarantined 2026-05-12 after the malicious
@@ -168,7 +175,9 @@ youtube = [
   "youtube-transcript-api==1.2.4",
 ]
 # `hermes dashboard` (localhost SPA + API).  Not in core to keep the default install lean.
-web = ["fastapi==0.133.1", "uvicorn[standard]==0.41.0"]
+# starlette==1.0.1 pinned for CVE-2026-48710 (BadHost) — fastapi pulls Starlette
+# transitively and pre-1.0.1 is the vulnerable range. See the mcp extra above.
+web = ["fastapi==0.133.1", "uvicorn[standard]==0.41.0", "starlette==1.0.1"]
 all = [
   # Policy (2026-05-12): `[all]` includes only extras that genuinely
   # CAN'T be lazy-installed via `tools/lazy_deps.py` — i.e. things every
diff --git a/tests/test_packaging_metadata.py b/tests/test_packaging_metadata.py
index d72c0224a..fadb022f3 100644
--- a/tests/test_packaging_metadata.py
+++ b/tests/test_packaging_metadata.py
@@ -115,3 +115,88 @@ def test_bundled_plugin_manifests_ship_in_both_wheel_and_sdist():
     assert "recursive-include plugins" in manifest and "plugin.yaml" in manifest, (
         "MANIFEST.in must recursive-include plugins plugin.yaml/plugin.yml (sdist)"
     )
+
+
+# Minimum non-vulnerable Starlette: CVE-2026-48710 ("BadHost") was fixed in
+# 1.0.1. Anything below that lets a malformed Host header desync
+# ``request.url.path`` from the dispatched ASGI path, bypassing path-based
+# authz in middleware/endpoints that gate on ``request.url``. Starlette is a
+# transitive dep (fastapi in [web]; sse-starlette/mcp in [mcp]/[computer-use]/
+# [dev]) so we pin it directly in every extra that exposes a server surface and
+# enforce the floor in both pyproject and the committed lockfile.
+_STARLETTE_CVE_FLOOR = (1, 0, 1)
+
+
+def _version_tuple(spec: str) -> tuple[int, ...]:
+    # "1.0.1" -> (1, 0, 1); tolerant of pre/post suffixes by truncating.
+    head = spec.split("+", 1)[0]
+    parts = []
+    for chunk in head.split("."):
+        digits = "".join(ch for ch in chunk if ch.isdigit())
+        if not digits:
+            break
+        parts.append(int(digits))
+    return tuple(parts)
+
+
+def test_starlette_pinned_above_cve_2026_48710_floor_in_pyproject():
+    """Every extra that declares Starlette must pin a patched (>=1.0.1) version.
+
+    Regression guard for #35067 / CVE-2026-48710. A future edit that drops the
+    pin (re-exposing the unbounded transitive ``starlette>=0.27`` from mcp /
+    ``>=0.40.0`` from fastapi) or pins a pre-1.0.1 version fails here instead of
+    shipping a Host-header auth-bypass to dashboard / MCP-HTTP users.
+    """
+    data = tomllib.loads((REPO_ROOT / "pyproject.toml").read_text(encoding="utf-8"))
+    extras = data["project"]["optional-dependencies"]
+
+    found = {}
+    for extra, specs in extras.items():
+        for spec in specs:
+            name = spec.split("==", 1)[0].split(">", 1)[0].split("<", 1)[0].split("[", 1)[0].strip()
+            if name.lower() == "starlette":
+                assert "==" in spec, f"[{extra}] must exact-pin starlette, got {spec!r}"
+                ver = spec.split("==", 1)[1].split(";", 1)[0].strip()
+                found[extra] = ver
+
+    # The four server-surface extras must each carry the direct pin.
+    for extra in ("web", "mcp", "computer-use", "dev"):
+        assert extra in found, (
+            f"[{extra}] no longer pins starlette directly — CVE-2026-48710 "
+            f"regression risk (mcp/fastapi pull it transitively with no upper bound)"
+        )
+
+    for extra, ver in found.items():
+        assert _version_tuple(ver) >= _STARLETTE_CVE_FLOOR, (
+            f"[{extra}] pins starlette=={ver}, below the CVE-2026-48710 fix "
+            f"floor {'.'.join(map(str, _STARLETTE_CVE_FLOOR))}"
+        )
+
+
+def test_locked_starlette_is_not_vulnerable_to_cve_2026_48710():
+    """The committed uv.lock must resolve starlette to a patched version.
+
+    pyproject pins protect the declared extras, but the lockfile is what
+    hash-verified installs (``uv sync --locked``) actually pull. Assert the
+    resolved version is >= the CVE-2026-48710 fix floor so a stale-lock
+    regression can't ship a vulnerable Starlette to users.
+    """
+    lock = (REPO_ROOT / "uv.lock").read_text(encoding="utf-8")
+    versions = []
+    in_starlette = False
+    for line in lock.splitlines():
+        if line.startswith("[[package]]"):
+            in_starlette = False
+        elif line.strip() == 'name = "starlette"':
+            in_starlette = True
+        elif in_starlette and line.startswith("version = "):
+            versions.append(line.split("=", 1)[1].strip().strip('"'))
+            in_starlette = False
+
+    assert versions, "starlette not found in uv.lock"
+    for ver in versions:
+        assert _version_tuple(ver) >= _STARLETTE_CVE_FLOOR, (
+            f"uv.lock resolves starlette=={ver}, below the CVE-2026-48710 fix "
+            f"floor {'.'.join(map(str, _STARLETTE_CVE_FLOOR))} — regenerate the "
+            f"lockfile after bumping the pin"
+        )
diff --git a/tools/lazy_deps.py b/tools/lazy_deps.py
index a0926a435..20d68f2f7 100644
--- a/tools/lazy_deps.py
+++ b/tools/lazy_deps.py
@@ -173,6 +173,7 @@ LAZY_DEPS: dict[str, tuple[str, ...]] = {
     "tool.dashboard": (
         "fastapi==0.133.1",
         "uvicorn[standard]==0.41.0",
+        "starlette==1.0.1",  # CVE-2026-48710 (BadHost) — keep lazy-install in sync with pyproject [web]
     ),
 }
 
diff --git a/uv.lock b/uv.lock
index 24205de86..299c659fd 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1640,6 +1640,7 @@ all = [
     { name = "ruff" },
     { name = "setuptools" },
     { name = "simple-term-menu" },
+    { name = "starlette" },
     { name = "ty" },
     { name = "uvicorn", extra = ["standard"] },
     { name = "youtube-transcript-api" },
@@ -1658,6 +1659,7 @@ cli = [
 ]
 computer-use = [
     { name = "mcp" },
+    { name = "starlette" },
 ]
 daytona = [
     { name = "daytona" },
@@ -1670,6 +1672,7 @@ dev = [
     { name = "pytest-timeout" },
     { name = "ruff" },
     { name = "setuptools" },
+    { name = "starlette" },
     { name = "ty" },
 ]
 dingtalk = [
@@ -1716,6 +1719,7 @@ matrix = [
 ]
 mcp = [
     { name = "mcp" },
+    { name = "starlette" },
 ]
 messaging = [
     { name = "aiohttp" },
@@ -1755,6 +1759,7 @@ termux = [
     { name = "python-telegram-bot", extra = ["webhooks"] },
     { name = "pywinpty", marker = "sys_platform == 'win32'" },
     { name = "simple-term-menu" },
+    { name = "starlette" },
 ]
 termux-all = [
     { name = "agent-client-protocol" },
@@ -1769,6 +1774,7 @@ termux-all = [
     { name = "python-telegram-bot", extra = ["webhooks"] },
     { name = "pywinpty", marker = "sys_platform == 'win32'" },
     { name = "simple-term-menu" },
+    { name = "starlette" },
     { name = "uvicorn", extra = ["standard"] },
 ]
 tts-premium = [
@@ -1781,6 +1787,7 @@ voice = [
 ]
 web = [
     { name = "fastapi" },
+    { name = "starlette" },
     { name = "uvicorn", extra = ["standard"] },
 ]
 wecom = [
@@ -1886,6 +1893,10 @@ requires-dist = [
     { name = "slack-sdk", marker = "extra == 'messaging'", specifier = "==3.40.1" },
     { name = "slack-sdk", marker = "extra == 'slack'", specifier = "==3.40.1" },
     { name = "sounddevice", marker = "extra == 'voice'", specifier = "==0.5.5" },
+    { name = "starlette", marker = "extra == 'computer-use'", specifier = "==1.0.1" },
+    { name = "starlette", marker = "extra == 'dev'", specifier = "==1.0.1" },
+    { name = "starlette", marker = "extra == 'mcp'", specifier = "==1.0.1" },
+    { name = "starlette", marker = "extra == 'web'", specifier = "==1.0.1" },
     { name = "tenacity", specifier = "==9.1.4" },
     { name = "ty", marker = "extra == 'dev'", specifier = "==0.0.21" },
     { name = "tzdata", marker = "sys_platform == 'win32'", specifier = "==2025.3" },
@@ -4084,15 +4095,15 @@ wheels = [
 
 [[package]]
 name = "starlette"
-version = "0.52.1"
+version = "1.0.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "anyio" },
     { name = "typing-extensions", marker = "python_full_version < '3.13'" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/c4/68/79977123bb7be889ad680d79a40f339082c1978b5cfcf62c2d8d196873ac/starlette-0.52.1.tar.gz", hash = "sha256:834edd1b0a23167694292e94f597773bc3f89f362be6effee198165a35d62933", size = 2653702, upload-time = "2026-01-18T13:34:11.062Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/08/a3/84e821cc54b4ab50ae6dbc6ac3800a651b65ec35f045cc73785380654057/starlette-1.0.1.tar.gz", hash = "sha256:512399c5f1de7fac99c88572212ded9ddeddef2fb32afa82d724000e88b38f4f", size = 2659596, upload-time = "2026-05-21T21:58:58.433Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/81/0d/13d1d239a25cbfb19e740db83143e95c772a1fe10202dda4b76792b114dd/starlette-0.52.1-py3-none-any.whl", hash = "sha256:0029d43eb3d273bc4f83a08720b4912ea4b071087a3b48db01b7c839f7954d74", size = 74272, upload-time = "2026-01-18T13:34:09.188Z" },
+    { url = "https://files.pythonhosted.org/packages/ec/e1/b2df4bc09a1e51ff664c1e17018a4274b42e5e9352e4a478ea540512dc88/starlette-1.0.1-py3-none-any.whl", hash = "sha256:7c0e69b2ee1c848bd54669d908500117a3ee13de603a21427e5c6fc1adf98dcd", size = 72802, upload-time = "2026-05-21T21:58:56.551Z" },
 ]
 
 [[package]]