diff --git a/.github/workflows/docker-publish.yml b/.github/workflows/docker-publish.yml
index 150a865..216affc 100644
--- a/.github/workflows/docker-publish.yml
+++ b/.github/workflows/docker-publish.yml
@@ -60,7 +60,7 @@ jobs:
           echo "IMAGE_REF=${REGISTRY}/${GITHUB_REPOSITORY,,}" >> "$GITHUB_ENV"
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@37fe631027851001ddb9b187196cc803df7f5f0e # v4
+        uses: docker/setup-buildx-action@f87e5991a6d7451dcb8d9637bfbc97413f497069 # v4
 
       - name: Log in to Container Registry
         uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4
@@ -82,7 +82,7 @@ jobs:
 
       - name: Build immutable native candidate
         id: build
-        uses: docker/build-push-action@53b7df96c91f9c12dcc8a07bcb9ccacbed38856a # v7
+        uses: docker/build-push-action@c3c9e263c25d99ce0380d002d59b67737d91b0dc # v7
         with:
           context: .
           platforms: linux/${{ matrix.arch }}
@@ -185,7 +185,7 @@ jobs:
           echo "IMAGE_REF=${REGISTRY}/${GITHUB_REPOSITORY,,}" >> "$GITHUB_ENV"
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@37fe631027851001ddb9b187196cc803df7f5f0e # v4
+        uses: docker/setup-buildx-action@f87e5991a6d7451dcb8d9637bfbc97413f497069 # v4
 
       - name: Log in to Container Registry
         uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4
diff --git a/.github/workflows/graph-pages.yml b/.github/workflows/graph-pages.yml
index 075362d..546e69c 100644
--- a/.github/workflows/graph-pages.yml
+++ b/.github/workflows/graph-pages.yml
@@ -20,7 +20,7 @@ jobs:
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
 
-      - uses: astral-sh/setup-uv@20cfd1bf945f4377ade1205e4dbc17946fc9a30d # v10.0.1
+      - uses: astral-sh/setup-uv@c18668ad3cf93ea998bef934396af7bb5c839dc7 # v10.2.0
         with:
           version: '0.12.3'
 
@@ -82,5 +82,5 @@ jobs:
       name: github-pages
       url: ${{ steps.deployment.outputs.page_url }}
     steps:
-      - uses: actions/deploy-pages@cd2ce8fcbc39b97be8ca5fce6e763baed58fa128 # v5
+      - uses: actions/deploy-pages@368f82528645a54fb793d4d04e342629a3f51346 # v5
         id: deployment
diff --git a/.github/workflows/security.yml b/.github/workflows/security.yml
index b6aab59..f14a820 100644
--- a/.github/workflows/security.yml
+++ b/.github/workflows/security.yml
@@ -35,10 +35,10 @@ jobs:
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@37fe631027851001ddb9b187196cc803df7f5f0e # v4
+        uses: docker/setup-buildx-action@f87e5991a6d7451dcb8d9637bfbc97413f497069 # v4
 
       - name: Build AMD64 scan candidate
-        uses: docker/build-push-action@53b7df96c91f9c12dcc8a07bcb9ccacbed38856a # v7
+        uses: docker/build-push-action@c3c9e263c25d99ce0380d002d59b67737d91b0dc # v7
         with:
           context: .
           platforms: linux/amd64
@@ -95,10 +95,10 @@ jobs:
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@37fe631027851001ddb9b187196cc803df7f5f0e # v4
+        uses: docker/setup-buildx-action@f87e5991a6d7451dcb8d9637bfbc97413f497069 # v4
 
       - name: Build ARM64 scan candidate
-        uses: docker/build-push-action@53b7df96c91f9c12dcc8a07bcb9ccacbed38856a # v7
+        uses: docker/build-push-action@c3c9e263c25d99ce0380d002d59b67737d91b0dc # v7
         with:
           context: .
           platforms: linux/arm64
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index d56cfde..8bbc166 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -73,7 +73,7 @@ jobs:
           python-version: '3.11'
 
       - name: Set up uv
-        uses: astral-sh/setup-uv@20cfd1bf945f4377ade1205e4dbc17946fc9a30d # v10.0.1
+        uses: astral-sh/setup-uv@c18668ad3cf93ea998bef934396af7bb5c839dc7 # v10.2.0
         with:
           version: '0.12.3'
 
@@ -536,7 +536,7 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@37fe631027851001ddb9b187196cc803df7f5f0e # v4
+        uses: docker/setup-buildx-action@f87e5991a6d7451dcb8d9637bfbc97413f497069 # v4
       - name: Exercise immutable promotion against a disposable local registry
         run: python scripts/check_release_promotion.py
 
diff --git a/requirements-test.txt b/requirements-test.txt
index 0636e4f..c04a6a4 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -887,10 +887,12 @@ typing-extensions==4.16.0 \
     # via
     #   pyopenssl
     #   sqlalchemy
-urllib3==2.7.0 \
-    --hash=sha256:231e0ec3b63ceb14667c67be60f2f2c40a518cb38b03af60abc813da26505f4c \
-    --hash=sha256:9fb4c81ebbb1ce9531cce37674bbc6f1360472bc18ca9a553ede278ef7276897
-    # via requests
+urllib3==2.8.0 \
+    --hash=sha256:0cf3cae568d36aa9576b28dfb35f11328f1cb974ca7647d9475ebb86c75ac6e3 \
+    --hash=sha256:63bf2ead4c879426ebf22ef2a781eeb4aa3b4ae798a0435506f8687fd5bb9b63
+    # via
+    #   -r requirements.in
+    #   requests
 webauthn==3.0.0 \
     --hash=sha256:324e54e1f6eeef486623b5d90df6fcd74ae04ff0c137d2b818a8f709b6ca3ab8 \
     --hash=sha256:b5d0c02b6efa16be683f8a75abd2073f5e59a15f42623cc22c31f27600259e64
diff --git a/requirements.in b/requirements.in
index 9e03c62..436e74d 100644
--- a/requirements.in
+++ b/requirements.in
@@ -32,6 +32,8 @@ qrcode>=8.2,<9
 Authlib>=1.8.0,<2
 # Compatibility: Authlib's Flask client uses the reviewed Requests 2.x transport API.
 requests>=2.34,<3
+# Compatibility: Requests 2.x supports urllib3 2.x; 2.8.0 fixes proxy TLS and chunk parsing vulnerabilities.
+urllib3>=2.8.0,<3
 # Compatibility: Bonsai 1.5.5 supports Python 3.10-3.14 and exposes the
 # reviewed OpenLDAP StartTLS, certificate-policy, timeout, and referral APIs.
 bonsai==1.5.5
diff --git a/requirements.txt b/requirements.txt
index 279aa96..85a5c87 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -856,10 +856,12 @@ typing-extensions==4.16.0 \
     # via
     #   pyopenssl
     #   sqlalchemy
-urllib3==2.7.0 \
-    --hash=sha256:231e0ec3b63ceb14667c67be60f2f2c40a518cb38b03af60abc813da26505f4c \
-    --hash=sha256:9fb4c81ebbb1ce9531cce37674bbc6f1360472bc18ca9a553ede278ef7276897
-    # via requests
+urllib3==2.8.0 \
+    --hash=sha256:0cf3cae568d36aa9576b28dfb35f11328f1cb974ca7647d9475ebb86c75ac6e3 \
+    --hash=sha256:63bf2ead4c879426ebf22ef2a781eeb4aa3b4ae798a0435506f8687fd5bb9b63
+    # via
+    #   -r requirements.in
+    #   requests
 webauthn==3.0.0 \
     --hash=sha256:324e54e1f6eeef486623b5d90df6fcd74ae04ff0c137d2b818a8f709b6ca3ab8 \
     --hash=sha256:b5d0c02b6efa16be683f8a75abd2073f5e59a15f42623cc22c31f27600259e64
diff --git a/tests/test_dependency_policy.py b/tests/test_dependency_policy.py
index 9922035..67f0d17 100644
--- a/tests/test_dependency_policy.py
+++ b/tests/test_dependency_policy.py
@@ -197,6 +197,12 @@ def test_runtime_locks_exclude_vulnerable_cryptography_versions(path):
     assert locked_version(path, "cryptography") >= Version("50.0.0")
 
 
+@pytest.mark.parametrize("path", ["requirements.txt", "requirements-test.txt"])
+def test_runtime_locks_exclude_vulnerable_urllib3_versions(path):
+    """CVE-2026-97687 and CVE-2026-97689 affect urllib3 before 2.8.0."""
+    assert locked_version(path, "urllib3") >= Version("2.8.0")
+
+
 @pytest.mark.parametrize("path", ["requirements.txt", "requirements-test.txt"])
 def test_runtime_locks_include_reviewed_mfa_libraries(path):
     """TOTP verification and local SVG provisioning require reviewed APIs."""
diff --git a/tests/test_supply_chain_policy.py b/tests/test_supply_chain_policy.py
index 7d01bf8..99ecbaf 100644
--- a/tests/test_supply_chain_policy.py
+++ b/tests/test_supply_chain_policy.py
@@ -20,7 +20,7 @@
         'v8.0.1',
     ),
     'actions/deploy-pages': (
-        'cd2ce8fcbc39b97be8ca5fce6e763baed58fa128',
+        '368f82528645a54fb793d4d04e342629a3f51346',
         'v5',
     ),
     'actions/setup-node': (
@@ -48,11 +48,11 @@
         'v0.36.0',
     ),
     'astral-sh/setup-uv': (
-        '20cfd1bf945f4377ade1205e4dbc17946fc9a30d',
-        'v10.0.1',
+        'c18668ad3cf93ea998bef934396af7bb5c839dc7',
+        'v10.2.0',
     ),
     'docker/build-push-action': (
-        '53b7df96c91f9c12dcc8a07bcb9ccacbed38856a',
+        'c3c9e263c25d99ce0380d002d59b67737d91b0dc',
         'v7',
     ),
     'docker/login-action': (
@@ -64,7 +64,7 @@
         'v6',
     ),
     'docker/setup-buildx-action': (
-        '37fe631027851001ddb9b187196cc803df7f5f0e',
+        'f87e5991a6d7451dcb8d9637bfbc97413f497069',
         'v4',
     ),
     'docker/setup-qemu-action': (