diff --git a/.github/workflows/build-autobahn.yml b/.github/workflows/build-autobahn.yml
new file mode 100644
index 000000000..f47f51d8c
--- /dev/null
+++ b/.github/workflows/build-autobahn.yml
@@ -0,0 +1,111 @@
+# SPDX-FileCopyrightText: 2026 The RISE Project
+# SPDX-License-Identifier: MIT
+---
+name: Build autobahn wheels (riscv64)
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'autobahn version to build (git tag without leading v, e.g. 26.7.1)'
+        required: true
+        default: '26.7.1'
+  pull_request:
+    paths:
+      - '.github/workflows/build-autobahn.yml'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ inputs.version || '26.7.1' }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read  # to fetch code (actions/checkout)
+
+env:
+  # `inputs.version` is empty on pull_request events; default to 26.7.1 there.
+  AUTOBAHN_VERSION: ${{ inputs.version || '26.7.1' }}
+  MANYLINUX_RISCV64_IMAGE: quay.io/pypa/manylinux_2_39_riscv64
+
+jobs:
+  setup:
+    uses: $/.github/workflows/_setup.yml
+
+  build_wheels:
+    needs: [setup]
+    name: Build autobahn ${{ inputs.version || '26.7.1' }} ${{ matrix.python }}-manylinux_riscv64
+    runs-on: ubuntu-24.04-riscv
+    timeout-minutes: 180
+    strategy:
+      fail-fast: false
+      matrix:
+        # Upstream doesn't build 3.14t yet, so skip it for now (matches
+        # build-fastuuid.yml's own reasoning).
+        python: ["cp312", "cp313", "cp314"]
+
+    steps:
+      - name: Checkout autobahn v${{ env.AUTOBAHN_VERSION }}
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1  # v7.0.1
+        with:
+          repository: crossbario/autobahn-python
+          ref: v${{ env.AUTOBAHN_VERSION }}
+          persist-credentials: false
+          # deps/flatbuffers (used only to bundle the optional, non-gating
+          # `flatc` dev-convenience binary) is intentionally left uninitialized:
+          # hatch_build.py already treats a missing submodule as a supported
+          # configuration (same as building from the PyPI sdist, which never
+          # includes it either) and skips flatc without failing the build.
+
+      - name: Build wheels
+        uses: pypa/cibuildwheel@1828c10ab37f080699c7b81cea34097c684a7074  # v4.2.0
+        with:
+          output-dir: wheelhouse/
+          only: ${{ matrix.python }}-manylinux_riscv64
+        env:
+          CIBW_MANYLINUX_RISCV64_IMAGE: ${{ env.MANYLINUX_RISCV64_IMAGE }}
+          # cffi, needed both to build and to import the NVX extension, has no
+          # riscv64 wheel on public PyPI; AUTOBAHN_USE_NVX=1 makes hatch_build.py
+          # fail the build (instead of silently degrading to a pure-Python
+          # wheel) if the CFFI compile doesn't succeed.
+          CIBW_ENVIRONMENT: >-
+            AUTOBAHN_USE_NVX=1
+            PIP_EXTRA_INDEX_URL=https://pypi.riseproject.dev/simple/
+          # pynacl and argon2-cffi-bindings (encryption/scram extras) are
+          # compiled deps that also need the riseproject.dev index above.
+          CIBW_TEST_REQUIRES: pytest pytest-asyncio
+          CIBW_TEST_EXTRAS: encryption,scram,serialization
+          # Test the installed wheel via --pyargs (not the checkout) so a
+          # packaging mistake can't hide behind the source tree; excludes
+          # autobahn.twisted, matching upstream's own `just test-asyncio`.
+          # USE_ASYNCIO=1 picks the asyncio txaio backend (autobahn/wamp/test
+          # otherwise raises at import time). autobahn.asyncio.test has no
+          # __init__.py by upstream design (so trial won't also collect it
+          # for the twisted suite - see its README_NO_INIT_PY), so --pyargs
+          # can't reach it; locate it via the installed module and run it as
+          # a plain path instead. test_asyncio_component[_404] call the
+          # pre-3.14 fallback of asyncio.get_event_loop() (create a loop when
+          # none is running); CPython 3.14 removed that fallback and the
+          # calls now raise RuntimeError outside a running loop - an upstream
+          # bug on every platform, not a riscv64 issue.
+          CIBW_TEST_COMMAND: >-
+            USE_ASYNCIO=1 python -m pytest -v --pyargs
+            autobahn.test autobahn.nvx.test autobahn.rawsocket.test
+            autobahn.wamp.test autobahn.websocket.test
+            -k "not test_asyncio_component"
+            && USE_ASYNCIO=1 python -m pytest -v
+            "$(python -c "import os,autobahn.asyncio as m; print(os.path.join(os.path.dirname(m.__file__), \"test\"))")"
+
+      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7.0.1
+        with:
+          name: autobahn-${{ env.AUTOBAHN_VERSION }}-${{ matrix.python }}-manylinux_riscv64
+          path: wheelhouse/*.whl
+          if-no-files-found: error
+
+  publish:
+    name: Publish autobahn ${{ inputs.version || '26.7.1' }}
+    needs: [setup, build_wheels]
+    permissions:
+      contents: write
+      pull-requests: write
+    uses: $/.github/workflows/_publish-wheel.yml
+    with:
+      artifact-pattern: autobahn-${{ inputs.version || '26.7.1' }}-*-manylinux_riscv64