diff --git a/.github/workflows/overcloud-host-image-build.yml b/.github/workflows/overcloud-host-image-build.yml
index 5d8adf4256..5168304005 100644
--- a/.github/workflows/overcloud-host-image-build.yml
+++ b/.github/workflows/overcloud-host-image-build.yml
@@ -54,7 +54,7 @@ jobs:
           sudo /etc/init.d/ssh start
 
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           path: src/kayobe-config
 
@@ -79,8 +79,8 @@ jobs:
         run: |
           echo "${{ steps.host_image_tag.outputs.host_image_tag }}"
 
-      - name: Clone StackHPC Kayobe repository
-        uses: actions/checkout@v4
+      - name: Checkout
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           repository: stackhpc/kayobe
           ref: refs/heads/stackhpc/${{ steps.openstack_release.outputs.openstack_release }}
@@ -96,7 +96,7 @@ jobs:
           pip install ../src/kayobe
 
       - name: Install terraform
-        uses: hashicorp/setup-terraform@v2
+        uses: hashicorp/setup-terraform@5e8dbf3c6d9deaf4193ca7a8fb23f2ac83bb6c85 # v4.0.0
 
       - name: Initialise terraform
         run: terraform init
@@ -501,7 +501,7 @@ jobs:
             steps.build_ubuntu_jammy.outcome == 'failure'
 
       - name: Upload logs artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
         with:
           name: Build logs
           path: ./logs
diff --git a/.github/workflows/overcloud-host-image-promote.yml b/.github/workflows/overcloud-host-image-promote.yml
index 1e91a50cdb..d372f14c64 100644
--- a/.github/workflows/overcloud-host-image-promote.yml
+++ b/.github/workflows/overcloud-host-image-promote.yml
@@ -35,7 +35,7 @@ jobs:
     if: github.repository == 'stackhpc/stackhpc-kayobe-config'
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           path: src/kayobe-config
 
@@ -47,7 +47,7 @@ jobs:
         working-directory: src/kayobe-config
 
       - name: Clone StackHPC Kayobe repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
         with:
           repository: stackhpc/kayobe
           ref: refs/heads/stackhpc/${{ steps.openstack_release.outputs.openstack_release }}
diff --git a/.github/workflows/overcloud-host-image-upload.yml b/.github/workflows/overcloud-host-image-upload.yml
index a648744afc..fc670604e3 100644
--- a/.github/workflows/overcloud-host-image-upload.yml
+++ b/.github/workflows/overcloud-host-image-upload.yml
@@ -51,7 +51,7 @@ jobs:
           sudo apt update
           sudo apt install -y build-essential git unzip nodejs python3-wheel python3-pip python3-venv
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           path: src/kayobe-config
 
@@ -62,7 +62,7 @@ jobs:
           echo "openstack_release=${BRANCH}" | sed -E "s,(stable|unmaintained)/,," >> $GITHUB_OUTPUT
 
       - name: Clone StackHPC Kayobe repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
         with:
           repository: stackhpc/kayobe
           ref: refs/heads/stackhpc/${{ steps.openstack_release.outputs.openstack_release }}
diff --git a/.github/workflows/stackhpc-all-in-one.yml b/.github/workflows/stackhpc-all-in-one.yml
index 7f426d3f87..415d7d0307 100644
--- a/.github/workflows/stackhpc-all-in-one.yml
+++ b/.github/workflows/stackhpc-all-in-one.yml
@@ -77,12 +77,13 @@ jobs:
       KAYOBE_VAULT_PASSWORD: ${{ secrets.KAYOBE_VAULT_PASSWORD }}
       KAYOBE_IMAGE: ${{ inputs.kayobe_image }}
     steps:
-      - name: Install Package
-        uses: ConorMacBride/install-package@main
-        with:
-          apt: git unzip nodejs openssh-client
+      - name: Install Package dependencies
+        run: |
+          sudo apt update &&
+          sudo apt install -y git unzip nodejs openssh-client
 
-      - uses: actions/checkout@v4
+      - name: Checkout config
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
            submodules: true
 
@@ -106,7 +107,7 @@ jobs:
           fi
 
       - name: Install terraform
-        uses: hashicorp/setup-terraform@v2
+        uses: hashicorp/setup-terraform@5e8dbf3c6d9deaf4193ca7a8fb23f2ac83bb6c85 # v4.0.0
 
       - name: Initialise terraform
         run: terraform init
@@ -320,7 +321,7 @@ jobs:
         if: ${{ always() && steps.tf_apply.outcome == 'success' }}
 
       - name: Upload test result artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
         with:
           name: test-results-${{ inputs.os_distribution }}-${{ inputs.os_release }}-${{ inputs.neutron_plugin }}
           path: |
diff --git a/.github/workflows/stackhpc-build-kayobe-image.yml b/.github/workflows/stackhpc-build-kayobe-image.yml
index e500fd8045..ddf205c66b 100644
--- a/.github/workflows/stackhpc-build-kayobe-image.yml
+++ b/.github/workflows/stackhpc-build-kayobe-image.yml
@@ -51,12 +51,12 @@ jobs:
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       - name: Checkout kayobe config
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           submodules: true
 
       - name: Log in to the Container registry
-        uses: docker/login-action@v3
+        uses: docker/login-action@4907a6ddec9925e35a0a9e82d7399ccc52663121 # v4.1.0
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
@@ -64,12 +64,12 @@ jobs:
 
       - name: Extract metadata (tags, labels) for Docker
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@030e881283bb7a6894de51c315a6bfe6a94e05cf # v6.0.0
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd # v4.0.0
         with:
           driver-opts: |
             image=moby/buildkit:master
@@ -85,7 +85,7 @@ jobs:
       # Setting KAYOBE_USER_UID and KAYOBE_USER_GID to 1001 to match docker's defaults
       # so that docker can run as a privileged user within the Kayobe image.
       - name: Build and push Docker image
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@d08e5c354a6adb9ed34480a06d141179aa583294 # v7.0.0
         with:
           file: ./.automation/docker/kayobe/Dockerfile
           context: .
@@ -100,8 +100,9 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
 
       - name: Send message to Slack via Workflow Builder
-        uses: slackapi/slack-github-action@v1.26.0
+        uses: slackapi/slack-github-action@af78098f536edbc4de71162a307590698245be95 # v3.0.1
         with:
+          webhook-type: "incoming-webhook"
           payload: |
             {
               "channel-id": "${{ env.SLACK_CHANNEL_ID }}",
diff --git a/.github/workflows/stackhpc-ci-cleanup.yml b/.github/workflows/stackhpc-ci-cleanup.yml
index a14b2970c5..6c431d7fa6 100644
--- a/.github/workflows/stackhpc-ci-cleanup.yml
+++ b/.github/workflows/stackhpc-ci-cleanup.yml
@@ -13,12 +13,12 @@ jobs:
     permissions: {}
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           path: src/kayobe-config
 
       - name: Setup Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
 
       - name: Generate clouds.yaml
         run: |
@@ -77,8 +77,9 @@ jobs:
           OS_APPLICATION_CREDENTIAL_SECRET: ${{ secrets.OS_APPLICATION_CREDENTIAL_SECRET }}
 
       - name: Send message to Slack via Workflow Builder
-        uses: slackapi/slack-github-action@v1.26.0
+        uses: slackapi/slack-github-action@af78098f536edbc4de71162a307590698245be95 # v3.0.1
         with:
+          webhook-type: "incoming-webhook"
           payload: |
             {
               "channel-id": "${{ env.SLACK_CHANNEL_ID }}",
diff --git a/.github/workflows/stackhpc-container-image-build.yml b/.github/workflows/stackhpc-container-image-build.yml
index 56c5bb0517..8ffc4d0af0 100644
--- a/.github/workflows/stackhpc-container-image-build.yml
+++ b/.github/workflows/stackhpc-container-image-build.yml
@@ -58,7 +58,7 @@ jobs:
       openstack_release: ${{ steps.openstack_release.outputs.openstack_release }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Determine OpenStack release
         id: openstack_release
@@ -125,12 +125,12 @@ jobs:
           sudo apt install gh -y
 
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           path: src/kayobe-config
 
       - name: Clone StackHPC Kayobe repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
         with:
           repository: stackhpc/kayobe
           ref: refs/heads/stackhpc/${{ needs.generate-tag.outputs.openstack_release }}
@@ -284,7 +284,7 @@ jobs:
         if: inputs.push
 
       - name: Upload output artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
         with:
           name: ${{ matrix.distro }}-logs
           path: image-build-logs
diff --git a/.github/workflows/stackhpc-promote.yml b/.github/workflows/stackhpc-promote.yml
index 386d4d405f..998173e7fc 100644
--- a/.github/workflows/stackhpc-promote.yml
+++ b/.github/workflows/stackhpc-promote.yml
@@ -29,8 +29,9 @@ jobs:
           echo "::notice Package repository promote workflow: https://github.com/stackhpc/stackhpc-release-train/actions/workflows/package-promote.yml"
 
       - name: Send message to Slack via Workflow Builder
-        uses: slackapi/slack-github-action@v1.26.0
+        uses: slackapi/slack-github-action@af78098f536edbc4de71162a307590698245be95 # v3.0.1
         with:
+          webhook-type: "incoming-webhook"
           payload: |
             {
               "channel-id": "${{ env.SLACK_CHANNEL_ID }}",
diff --git a/.github/workflows/stackhpc-pull-request.yml b/.github/workflows/stackhpc-pull-request.yml
index ec0ddccfba..86e29fbbff 100644
--- a/.github/workflows/stackhpc-pull-request.yml
+++ b/.github/workflows/stackhpc-pull-request.yml
@@ -16,16 +16,17 @@ jobs:
     runs-on: ubuntu-22.04
     permissions:
       pull-requests: read
+      packages: none
     name: Check changed files
     if: github.repository == 'stackhpc/stackhpc-kayobe-config'
     outputs:
       aio: ${{ steps.changes.outputs.aio }}
     steps:
       - name: GitHub Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Check changed files
-        uses: dorny/paths-filter@v3
+        uses: dorny/paths-filter@fbd0ab8f3e69293af611ebaee6363fc25e6d187d # v4.0.1
         id: changes
         with:
           # Filters are defined in this file.
@@ -47,11 +48,11 @@ jobs:
     if: github.repository == 'stackhpc/stackhpc-kayobe-config'
     steps:
       - name: GitHub Checkout 🛎
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0
       - name: Setup Python ${{ matrix.python-version }} 🐍
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install Tox 📦
@@ -69,6 +70,9 @@ jobs:
 
   build-kayobe-image:
     name: Build Kayobe Image
+    permissions:
+      contents: read
+      packages: write # required by docker/build-push-action
     needs:
       - check-changes
     uses: ./.github/workflows/stackhpc-build-kayobe-image.yml
@@ -172,6 +176,7 @@ jobs:
 
   all-in-one-ubuntu-jammy-ovs:
     name: aio (Ubuntu Jammy OVS)
+    permissions: {}
     needs:
       - check-changes
       - build-kayobe-image
@@ -206,6 +211,7 @@ jobs:
 
   all-in-one-rocky-9-ovs:
     name: aio (Rocky 9 OVS)
+    permissions: {}
     needs:
       - check-changes
       - build-kayobe-image
@@ -223,6 +229,7 @@ jobs:
 
   all-in-one-rocky-9-ovn:
     name: aio (Rocky 9 OVN)
+    permissions: {}
     needs:
       - check-changes
       - build-kayobe-image
diff --git a/etc/kayobe/kolla.yml b/etc/kayobe/kolla.yml
index 13e6a1f22c..4c196184a2 100644
--- a/etc/kayobe/kolla.yml
+++ b/etc/kayobe/kolla.yml
@@ -134,6 +134,10 @@ kolla_sources:
     type: git
     location: https://github.com/stackhpc/stackhpc-inspector-plugins.git
     reference: 1.3.0
+  keystone-base:
+    type: git
+    location: https://github.com/stackhpc/keystone.git
+    reference: stackhpc/{{ openstack_release }}
   magnum-base:
     type: git
     location: https://github.com/stackhpc/magnum.git
diff --git a/etc/kayobe/kolla/globals.yml b/etc/kayobe/kolla/globals.yml
index 8f9c79f4c6..73828e5ab0 100644
--- a/etc/kayobe/kolla/globals.yml
+++ b/etc/kayobe/kolla/globals.yml
@@ -32,9 +32,9 @@ kayobe_image_tags:
     rocky: yoga-20240320T082414
     ubuntu: yoga-20240320T082414
   keystone:
-    centos: yoga-20260401T104301
-    rocky: yoga-20260401T104301
-    ubuntu: yoga-20260401T104301
+    centos: yoga-20260528T064235
+    rocky: yoga-20260528T064235
+    ubuntu: yoga-20260528T064235
   magnum:
     centos: yoga-20240416T102136
     rocky: yoga-20240416T102136
diff --git a/releasenotes/notes/fix-keystone-multiple-cves-6166cf4143f53fd3.yaml b/releasenotes/notes/fix-keystone-multiple-cves-6166cf4143f53fd3.yaml
new file mode 100644
index 0000000000..0ae7675587
--- /dev/null
+++ b/releasenotes/notes/fix-keystone-multiple-cves-6166cf4143f53fd3.yaml
@@ -0,0 +1,5 @@
+---
+security:
+  - |
+    Fixes CVE-2026-42998, CVE-2026-42999, CVE-2026-43000, CVE-2026-43001
+    and CVE-2026-44394 with updated Keystone images.