diff --git a/.github/workflows/nightly-tests.yaml b/.github/workflows/nightly-tests.yaml
index afa9475af4..7bb5a1bfeb 100644
--- a/.github/workflows/nightly-tests.yaml
+++ b/.github/workflows/nightly-tests.yaml
@@ -32,7 +32,7 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@949feb2413d6458794dcd2491c4babbbce0c15c1 # v7.1.0
         with:
-          node-version: "24"
+          node-version: "26"
 
       # kubectl/kustomize/helm/opentofu are what the tests shell out to (kubectl kustomize,
       # helm template) to render the real manifests they assert on; python/uv provision the
@@ -58,7 +58,7 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@949feb2413d6458794dcd2491c4babbbce0c15c1 # v7.1.0
         with:
-          node-version: "24"
+          node-version: "26"
 
       - name: Install renovate for pin tests
         run: |
diff --git a/.github/workflows/validate.yaml b/.github/workflows/validate.yaml
index 1131ceba3d..848eef7c46 100644
--- a/.github/workflows/validate.yaml
+++ b/.github/workflows/validate.yaml
@@ -189,7 +189,7 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@949feb2413d6458794dcd2491c4babbbce0c15c1 # v7.1.0
         with:
-          node-version: "24"
+          node-version: "26"
 
       # Unpinned on purpose: renovate.yaml runs `renovate-version: latest`, so the
       # config has to be valid against whatever Renovate is current, not against a
@@ -374,7 +374,7 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@949feb2413d6458794dcd2491c4babbbce0c15c1 # v7.1.0
         with:
-          node-version: "24"
+          node-version: "26"
 
       # kubectl/kustomize/helm/opentofu are what the tests shell out to (kubectl kustomize,
       # helm template) to render the real manifests they assert on; python/uv provision the
@@ -400,7 +400,7 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@949feb2413d6458794dcd2491c4babbbce0c15c1 # v7.1.0
         with:
-          node-version: "24"
+          node-version: "26"
 
       - name: Install renovate for pin tests
         run: |