diff --git a/poetry.lock b/poetry.lock
index f3b3789..e5d01fb 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -8660,6 +8660,7 @@ description = "Tornado is a Python web framework and asynchronous networking lib
 optional = false
 python-versions = ">=3.9"
 groups = ["main"]
+markers = "python_version == \"3.10\""
 files = [
     {file = "tornado-6.5.10-cp39-abi3-macosx_10_9_universal2.whl", hash = "sha256:9261783640e23258694a9ff0795df430a5a7b0a651d3dd53dd0969ad6be16da7"},
     {file = "tornado-6.5.10-cp39-abi3-macosx_10_9_x86_64.whl", hash = "sha256:83e6cf438b106c6b3852d70960967bb1b70c87438050dca0981e4b9aa751a4c1"},
@@ -8673,6 +8674,60 @@ files = [
     {file = "tornado-6.5.10.tar.gz", hash = "sha256:a6b1ccd08c04b4a06fb5aeb381be99de5ad1e5375c1785e31d78c880feb57687"},
 ]
 
+[[package]]
+name = "tornado"
+version = "6.6"
+description = "Tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed."
+optional = false
+python-versions = ">=3.11"
+groups = ["main"]
+markers = "python_version >= \"3.11\""
+files = [
+    {file = "tornado-6.6-cp311-abi3-macosx_10_9_universal2.whl", hash = "sha256:01abf15429d64f04ccfafc238b191cc2c177108b7a331f4461707ad77198c8c2"},
+    {file = "tornado-6.6-cp311-abi3-manylinux1_x86_64.manylinux_2_28_x86_64.manylinux_2_5_x86_64.whl", hash = "sha256:11bb97c00981eb8254e55bd6a5ad960c983ae343fef8ae3ae5584cd1fb70236a"},
+    {file = "tornado-6.6-cp311-abi3-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl", hash = "sha256:4e152a3b2d3eae113b836d979823f7bb2320f7e334a84449729964921f374a4c"},
+    {file = "tornado-6.6-cp311-abi3-manylinux2014_ppc64le.manylinux_2_17_ppc64le.manylinux_2_28_ppc64le.whl", hash = "sha256:e912d4c4babd04db6f34b25b748174a4a176debe86c8610beedf1815f9af7fdd"},
+    {file = "tornado-6.6-cp311-abi3-manylinux2014_s390x.manylinux_2_17_s390x.manylinux_2_28_s390x.whl", hash = "sha256:33aabe8a03d426cef4e0fe5669f0643cadd983b54957f1a7ac2789ec326e9644"},
+    {file = "tornado-6.6-cp311-abi3-manylinux_2_31_riscv64.manylinux_2_39_riscv64.whl", hash = "sha256:9aaf0e1c2fb9f046f30e2036b8d2060666399e8464d0a72769e43c754089567b"},
+    {file = "tornado-6.6-cp311-abi3-musllinux_1_2_aarch64.whl", hash = "sha256:61fc5513cea97720ab9bf54b04827ac0f4500c63f0b072b963d6145c798b4661"},
+    {file = "tornado-6.6-cp311-abi3-musllinux_1_2_ppc64le.whl", hash = "sha256:31e1a0d5cd704d2fe8a008c1cc27a0e2b67269ca263630a27985dddc160b5537"},
+    {file = "tornado-6.6-cp311-abi3-musllinux_1_2_riscv64.whl", hash = "sha256:74416e41e9bdf70fbc2fb242f6fbbc7a58ec11e59d39f15fc5a421ecb6845118"},
+    {file = "tornado-6.6-cp311-abi3-musllinux_1_2_s390x.whl", hash = "sha256:8cdd69104ae9d705b3f04d2563aa96e357043e267a455802daae9a1e633a37c8"},
+    {file = "tornado-6.6-cp311-abi3-musllinux_1_2_x86_64.whl", hash = "sha256:fc7c8a3263501fbe97518cd699101bc3c5f499a7dd4f75fc6cbb3bd9ee1db1f1"},
+    {file = "tornado-6.6-cp311-abi3-win32.whl", hash = "sha256:b54ca69ff93d0374efb083a12a1e9ec2dd2036e8496d197e0e8ef77b8d9135c3"},
+    {file = "tornado-6.6-cp311-abi3-win_amd64.whl", hash = "sha256:48f26ed9d7beb64e5f06adc864524e581ab6d62ba8ff46eaaa1ac2d0e6d753fd"},
+    {file = "tornado-6.6-cp311-abi3-win_arm64.whl", hash = "sha256:29114ffd4e4de869d390393df9e9a0f191065aae1a96f38a58d35e464c04a867"},
+    {file = "tornado-6.6-cp314-cp314t-macosx_10_15_universal2.whl", hash = "sha256:63fc8d243b52fd8dd9ed4ad02d0df08f2024f9aea632a433a8a6c91075076d44"},
+    {file = "tornado-6.6-cp314-cp314t-manylinux1_x86_64.manylinux_2_28_x86_64.manylinux_2_5_x86_64.whl", hash = "sha256:8d4b85cac795bfc6a7f20ba81871abb8c2ae8fba019061b8a9ae1c2f97e29637"},
+    {file = "tornado-6.6-cp314-cp314t-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl", hash = "sha256:e035c065edadfa696529d05eebcbeb25154c129b5aee6dbfb697a6abf5d4f697"},
+    {file = "tornado-6.6-cp314-cp314t-manylinux2014_ppc64le.manylinux_2_17_ppc64le.manylinux_2_28_ppc64le.whl", hash = "sha256:5b94e589ab855090c448b5c0937b3a75f1c1a604b7b36207e8236d209f720b9c"},
+    {file = "tornado-6.6-cp314-cp314t-manylinux2014_s390x.manylinux_2_17_s390x.manylinux_2_28_s390x.whl", hash = "sha256:1a394c8c9db9137f2a2b42869d9f7b91398fcf19da120d0dde4c4546172710f7"},
+    {file = "tornado-6.6-cp314-cp314t-manylinux_2_31_riscv64.manylinux_2_39_riscv64.whl", hash = "sha256:0215d1df6e4b5e736ddad5adf0af4138cf7437fdd39c77c5e69768e37850a632"},
+    {file = "tornado-6.6-cp314-cp314t-musllinux_1_2_aarch64.whl", hash = "sha256:4d711790e0a9576ad924d942c4607e4e401d697588ea6f30f6662824008a7add"},
+    {file = "tornado-6.6-cp314-cp314t-musllinux_1_2_ppc64le.whl", hash = "sha256:034a66bae0f55421d007803e2385d2a59707d8829b2f026373d42f08256e9922"},
+    {file = "tornado-6.6-cp314-cp314t-musllinux_1_2_riscv64.whl", hash = "sha256:5cb38483b077129056a94dd415a71d29ab4e42b46da894fee8b4657003f10b21"},
+    {file = "tornado-6.6-cp314-cp314t-musllinux_1_2_s390x.whl", hash = "sha256:46bbbd107efa37777ac4b83601866d19b4dbd5b770a7a9123582633d95959ad3"},
+    {file = "tornado-6.6-cp314-cp314t-musllinux_1_2_x86_64.whl", hash = "sha256:b85e9d0263cdbc027b95947c8b873a7bc7fd6a08d16bfb4f5047350b0808e464"},
+    {file = "tornado-6.6-cp314-cp314t-win32.whl", hash = "sha256:4276eef0880e5fe4488e6799c2842f59af3b06637e9313ab4fb506f9c9c2d6cb"},
+    {file = "tornado-6.6-cp314-cp314t-win_amd64.whl", hash = "sha256:10d4af98c6df09f8429b1340ccaea3a72887b86f695dfb8056bda517c8115a00"},
+    {file = "tornado-6.6-cp314-cp314t-win_arm64.whl", hash = "sha256:b1f0ef20a5278854f5fdac31637bafadb055405df28b7fc945e54add12b172e3"},
+    {file = "tornado-6.6-cp315-cp315t-macosx_10_15_universal2.whl", hash = "sha256:8f8e382da30fe042f27f27a871e21aefc2613870e5a41648de18446c72d6ea59"},
+    {file = "tornado-6.6-cp315-cp315t-manylinux1_x86_64.manylinux_2_28_x86_64.manylinux_2_5_x86_64.whl", hash = "sha256:8c7a8a328396c2195454a2ecd9499512441bbce99505544a717e6a87d16ff6f9"},
+    {file = "tornado-6.6-cp315-cp315t-manylinux2014_aarch64.manylinux_2_17_aarch64.manylinux_2_28_aarch64.whl", hash = "sha256:ca025bb0da81c294aef26f27427316df1525220820315f4bf32dc1e84a4d2232"},
+    {file = "tornado-6.6-cp315-cp315t-manylinux2014_ppc64le.manylinux_2_17_ppc64le.manylinux_2_28_ppc64le.whl", hash = "sha256:59c22ebc905ac2a267f8d9d8a878f86afbcbbde329d75c485f1422fc45a81b83"},
+    {file = "tornado-6.6-cp315-cp315t-manylinux2014_s390x.manylinux_2_17_s390x.manylinux_2_28_s390x.whl", hash = "sha256:f89802bc0bcd15f988d9325b4e6d2171bb04ea68d188732556335e10d3fd00bd"},
+    {file = "tornado-6.6-cp315-cp315t-manylinux_2_31_riscv64.manylinux_2_39_riscv64.whl", hash = "sha256:70043256d5958f9c655066153d23d60ea3e29bf9854f7fb75850e223c477758a"},
+    {file = "tornado-6.6-cp315-cp315t-musllinux_1_2_aarch64.whl", hash = "sha256:82b49495e3849d644b841ef33b35491160055997deaa93720ff647ef019421db"},
+    {file = "tornado-6.6-cp315-cp315t-musllinux_1_2_ppc64le.whl", hash = "sha256:07b2bcaa4bf447bdbfb664e4c28344226540db3f0ebccd74886528338a240765"},
+    {file = "tornado-6.6-cp315-cp315t-musllinux_1_2_riscv64.whl", hash = "sha256:c36b921374c302e54909bae17d9f354061d80e7ae7d8c94f73abbcc217866460"},
+    {file = "tornado-6.6-cp315-cp315t-musllinux_1_2_s390x.whl", hash = "sha256:7412d9e37aa9f7048e4b591f520a95f7a097278ffab15f1ddf3f5c2320cf6648"},
+    {file = "tornado-6.6-cp315-cp315t-musllinux_1_2_x86_64.whl", hash = "sha256:15bc95112b2d24b0bfaee9a004e3f974da929e33b4244a7f695a22f45b08a5e5"},
+    {file = "tornado-6.6-cp315-cp315t-win32.whl", hash = "sha256:f661c21117b875d612371f3eb243d0c69f56d9bdd6aee38b7c24453419dfe554"},
+    {file = "tornado-6.6-cp315-cp315t-win_amd64.whl", hash = "sha256:ee8853ab35da510dc952879ebd9995c82bc10ffb7925fd87930dc0d6916f4b39"},
+    {file = "tornado-6.6-cp315-cp315t-win_arm64.whl", hash = "sha256:7de62e2dfdf559fd7154d2b9aa58ff3d9cff8304ae0519341feb082618bc2a33"},
+    {file = "tornado-6.6.tar.gz", hash = "sha256:34c4aa916d7f2b2d5cadee2c6850f5a4a7f3d688cbf58399ea9bd3057af4abd5"},
+]
+
 [[package]]
 name = "traitlets"
 version = "5.14.3"
@@ -9663,4 +9718,4 @@ server = ["deepnote-python-lsp-server", "jupyter-resource-usage", "jupyter-serve
 [metadata]
 lock-version = "2.1"
 python-versions = ">=3.10.0,<3.15"
-content-hash = "d67aff3db6d282b0cf2b52a50b97203cdfd9343cd6ff9bb1b033c510e3981144"
+content-hash = "34f9d473758c3d03a4579dc0235dc6da5a5ebd40dab1c0bc6fdbb01aff740464"
diff --git a/pyproject.toml b/pyproject.toml
index 6ed9fb8..5a5efdb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -144,7 +144,8 @@ dependencies = [
     "cryptography>=50.0.0,<51",
     "protobuf>=5.29.6,<6",
     "requests>=2.32.4,<3",
-    "tornado>=6.5.9,<7",  # 6.5.9 fixes GHSA-3hv7-mjh2-fv65, GHSA-c2m8-h5v5-343r, GHSA-chx6-46f5-w4vp
+    "tornado>=6.6,<7; python_version >= '3.11'",  # 6.6 fixes CVE-2026-115927, CVE-2026-116577, CVE-2026-116578
+    "tornado>=6.5.9,<7; python_version < '3.11'",  # tornado 6.6 requires Python 3.11
     "filelock>=4.2.1,<5; python_version >= '3.11'",  # 4.2.1 fixes CVE-2026-112907, CVE-2026-112913, CVE-2026-112940
     "filelock==3.20.3; python_version < '3.11'",  # 3.20.4 through 4.2.0 carry those advisories, and 4.2.1 requires Python 3.11
     "pyjwt>=2.15.0,<3",  # 2.15.0 fixes PYSEC-2026-4140..4152, PYSEC-2026-4183