diff --git a/.github/actions/setup-compose/action.yml b/.github/actions/setup-compose/action.yml
new file mode 100644
index 00000000..6b5c7f3f
--- /dev/null
+++ b/.github/actions/setup-compose/action.yml
@@ -0,0 +1,16 @@
+name: Set up Compose build workaround
+description: Disable Bake filesystem entitlement checks for Compose 2.38.x and 5.6.x patch releases.
+
+runs:
+  using: composite
+  steps:
+  - name: Check Compose version
+    shell: bash
+    run: |
+      version=$(docker compose version --short)
+      echo "Compose version: $version"
+      # Temporary workaround for https://github.com/devcontainers/cli/issues/1320.
+      if [[ "${version#v}" =~ ^(2\.38|5\.6)\.[0-9]+$ ]]; then
+        echo "::warning::Disabling Bake filesystem and default SSH-agent consent checks for Compose $version."
+        echo "BUILDX_BAKE_ENTITLEMENTS_FS=0" >> "$GITHUB_ENV"
+      fi
diff --git a/.github/workflows/test-pr.yaml b/.github/workflows/test-pr.yaml
index 8bcf0f52..c5c0a6d6 100644
--- a/.github/workflows/test-pr.yaml
+++ b/.github/workflows/test-pr.yaml
@@ -99,6 +99,8 @@ jobs:
             fi
           fi
 
+      - uses: ./.github/actions/setup-compose
+
       - name: Run Smoke Test
         run: |
           template_id="${{ matrix.templates }}"
diff --git a/src/cpp-mariadb/devcontainer-template.json b/src/cpp-mariadb/devcontainer-template.json
index 08c008ff..e5805d76 100644
--- a/src/cpp-mariadb/devcontainer-template.json
+++ b/src/cpp-mariadb/devcontainer-template.json
@@ -1,6 +1,6 @@
 {
     "id": "cpp-mariadb",
-    "version": "4.1.0",
+    "version": "4.1.1",
     "name": "C++ & MariaDB",
     "description": "Develop C++ applications on Linux. Includes Debian C++ build tools.",
     "documentationURL": "https://github.com/devcontainers/templates/tree/main/src/cpp-mariadb",
@@ -9,10 +9,11 @@
     "options": {
         "imageVariant": {
             "type": "string",
-            "description": "Debian / Ubuntu version (use Debian 13, Debian 12, Ubuntu 24.04, and Ubuntu 22.04 on local arm64/Apple Silicon):",
+            "description": "Debian / Ubuntu version (use Debian 13, Debian 12, Ubuntu 26.04, Ubuntu 24.04, and Ubuntu 22.04 on local arm64/Apple Silicon):",
             "proposals": [
                 "debian13",
                 "debian12",
+                "ubuntu26.04",
                 "ubuntu24.04",
                 "ubuntu22.04"
             ],
diff --git a/src/cpp/devcontainer-template.json b/src/cpp/devcontainer-template.json
index f6df6632..b10dc3a6 100644
--- a/src/cpp/devcontainer-template.json
+++ b/src/cpp/devcontainer-template.json
@@ -1,6 +1,6 @@
 {
     "id": "cpp",
-    "version": "4.1.1",
+    "version": "4.1.2",
     "name": "C++",
     "description": "Develop C++ applications on Linux. Includes Debian C++ build tools.",
     "documentationURL": "https://github.com/devcontainers/templates/tree/main/src/cpp",
@@ -9,10 +9,11 @@
     "options": {
         "imageVariant": {
             "type": "string",
-            "description": "Debian / Ubuntu version (use debian13, debian12, ubuntu24.04, and ubuntu22.04 on local arm64/Apple Silicon):",
+            "description": "Debian / Ubuntu version (use debian13, debian12, ubuntu26.04, ubuntu24.04, and ubuntu22.04 on local arm64/Apple Silicon):",
             "proposals": [
                 "debian13",
                 "debian12",
+                "ubuntu26.04",
                 "ubuntu24.04",
                 "ubuntu22.04"
             ],
diff --git a/src/javascript-node-mongo/devcontainer-template.json b/src/javascript-node-mongo/devcontainer-template.json
index 498dfa25..e055b609 100644
--- a/src/javascript-node-mongo/devcontainer-template.json
+++ b/src/javascript-node-mongo/devcontainer-template.json
@@ -1,6 +1,6 @@
 {
     "id": "javascript-node-mongo",
-    "version": "6.0.2",
+    "version": "6.0.3",
     "name": "Node.js & Mongo DB",
     "description": "Develop applications in Node.js and Mongo DB. Includes Node.js, eslint, and yarn in a container linked to a Mongo DB.",
     "documentationURL": "https://github.com/devcontainers/templates/tree/main/src/javascript-node-mongo",
@@ -11,10 +11,11 @@
             "type": "string",
             "description": "Node.js version (use -bookworm variants on local arm64/Apple Silicon):",
             "proposals": [
+                "26-bookworm",
                 "24-bookworm",
                 "22-bookworm"
             ],
-            "default": "24-bookworm"
+            "default": "26-bookworm"
         }
     },
     "platforms": [
diff --git a/src/javascript-node-postgres/devcontainer-template.json b/src/javascript-node-postgres/devcontainer-template.json
index 51f12df0..0e235dba 100644
--- a/src/javascript-node-postgres/devcontainer-template.json
+++ b/src/javascript-node-postgres/devcontainer-template.json
@@ -1,6 +1,6 @@
 {
     "id": "javascript-node-postgres",
-    "version": "6.0.2",
+    "version": "6.0.3",
     "name": "Node.js & PostgreSQL",
     "description": "Develop applications in Node.js and PostgreSQL. Includes Node.js, eslint, and yarn in a container linked to a Postgres DB container",
     "documentationURL": "https://github.com/devcontainers/templates/tree/main/src/javascript-node-postgres",
@@ -11,12 +11,14 @@
             "type": "string",
             "description": "Node.js version (use -trixie or -bookworm variants on local arm64/Apple Silicon):",
             "proposals": [
+                "26-trixie",
                 "24-trixie",
                 "22-trixie",
+                "26-bookworm",
                 "24-bookworm",
                 "22-bookworm"
             ],
-            "default": "24-trixie"
+            "default": "26-trixie"
         }
     },
     "platforms": [
diff --git a/src/javascript-node/devcontainer-template.json b/src/javascript-node/devcontainer-template.json
index 2992a82f..5c67786a 100644
--- a/src/javascript-node/devcontainer-template.json
+++ b/src/javascript-node/devcontainer-template.json
@@ -1,6 +1,6 @@
 {
     "id": "javascript-node",
-    "version": "6.0.2",
+    "version": "6.0.3",
     "name": "Node.js & JavaScript",
     "description": "Develop Node.js based applications. Includes Node.js, eslint, nvm, and yarn.",
     "documentationURL": "https://github.com/devcontainers/templates/tree/main/src/javascript-node",
@@ -11,12 +11,14 @@
             "type": "string",
             "description": "Node.js version (use -trixie or -bookworm variants on local arm64/Apple Silicon):",
             "proposals": [
+                "26-trixie",
                 "24-trixie",
                 "22-trixie",
+                "26-bookworm",
                 "24-bookworm",
                 "22-bookworm"
             ],
-            "default": "24-trixie"
+            "default": "26-trixie"
         }
     },
     "platforms": [
diff --git a/src/postgres/devcontainer-template.json b/src/postgres/devcontainer-template.json
index 4146d42b..f0912cdc 100644
--- a/src/postgres/devcontainer-template.json
+++ b/src/postgres/devcontainer-template.json
@@ -1,6 +1,6 @@
 {
     "id": "postgres",
-    "version": "3.0.1",
+    "version": "3.0.2",
     "name": "Python 3 & PostgreSQL",
     "description": "Develop applications with Python 3 and PostgreSQL. Includes a Python application container and PostgreSQL server.",
     "documentationURL": "https://github.com/devcontainers/templates/tree/main/src/postgres",
@@ -11,18 +11,20 @@
             "type": "string",
             "description": "Python version (use -trixie or -bookworm variants on local arm64/Apple Silicon):",
             "proposals": [
+                "3.15-trixie",
                 "3.14-trixie",
                 "3.13-trixie",
                 "3.12-trixie",
                 "3.11-trixie",
                 "3.10-trixie",
+                "3.15-bookworm",
                 "3.14-bookworm",
                 "3.13-bookworm",
                 "3.12-bookworm",
                 "3.11-bookworm",
                 "3.10-bookworm"
             ],
-            "default": "3.14-trixie"
+            "default": "3.15-trixie"
         }
     },
     "platforms": ["Python"],
diff --git a/src/python/devcontainer-template.json b/src/python/devcontainer-template.json
index 7495b03f..fc264137 100644
--- a/src/python/devcontainer-template.json
+++ b/src/python/devcontainer-template.json
@@ -1,6 +1,6 @@
 {
     "id": "python",
-    "version": "6.0.0",
+    "version": "6.0.1",
     "name": "Python 3",
     "description": "Develop Python 3 applications.",
     "documentationURL": "https://github.com/devcontainers/templates/tree/main/src/python",
@@ -12,19 +12,21 @@
             "description": "Python version (use -trixie, or -bookworm variants on local arm64/Apple Silicon):",
             "proposals": [
                 "3-trixie",
+                "3.15-trixie",
                 "3.14-trixie",
                 "3.13-trixie",
                 "3.12-trixie",
                 "3.11-trixie",
                 "3.10-trixie",
                 "3-bookworm",
+                "3.15-bookworm",
                 "3.14-bookworm",
                 "3.13-bookworm",
                 "3.12-bookworm",
                 "3.11-bookworm",
                 "3.10-bookworm"
             ],
-            "default": "3.14-trixie"
+            "default": "3.15-trixie"
         }
     },
     "platforms": ["Python"],
diff --git a/src/typescript-node/devcontainer-template.json b/src/typescript-node/devcontainer-template.json
index 9d21f3a6..c053a722 100644
--- a/src/typescript-node/devcontainer-template.json
+++ b/src/typescript-node/devcontainer-template.json
@@ -1,6 +1,6 @@
 {
     "id": "typescript-node",
-    "version": "6.0.2",
+    "version": "6.0.3",
     "name": "Node.js & TypeScript",
     "description": "Develop Node.js based applications in TypeScript. Includes Node.js, eslint, nvm, yarn, and the TypeScript compiler.",
     "documentationURL": "https://github.com/devcontainers/templates/tree/main/src/typescript-node",
@@ -11,12 +11,14 @@
             "type": "string",
             "description": "Node.js version (use -trixie or -bookworm variants on local arm64/Apple Silicon):",
             "proposals": [
+                "26-trixie",
                 "24-trixie",
                 "22-trixie",
+                "26-bookworm",
                 "24-bookworm",
                 "22-bookworm"
             ],
-            "default": "24-trixie"
+            "default": "26-trixie"
         }
     },
     "platforms": [
diff --git a/test/javascript-node-mongo/test.sh b/test/javascript-node-mongo/test.sh
index 2b43b482..6ad25cdb 100755
--- a/test/javascript-node-mongo/test.sh
+++ b/test/javascript-node-mongo/test.sh
@@ -3,6 +3,9 @@ cd $(dirname "$0")
 
 source test-utils.sh node
 
+check "corepack_setup" bash -c 'sudo npm install --global --force corepack@0.36.0 && corepack_path=$(command -v corepack) && sudo env "PATH=$PATH" "$corepack_path" enable && "$corepack_path" prepare yarn@4.9.4 --activate'
+check "yarn_version_new" yarn --version
+
 # Remote - Containers does not auto-sync UID/GID for Docker Compose,
 # so make sure test project prvs match the non-root user in the container.
 fixTestProjectFolderPrivs
@@ -14,6 +17,7 @@ checkCommon
 checkExtension "dbaeumer.vscode-eslint"
 check "node" node --version
 sudo rm -f yarn.lock
+touch yarn.lock
 check "yarn" yarn install
 sudo rm -f package-lock.json
 check "npm" npm install
diff --git a/test/javascript-node-postgres/test.sh b/test/javascript-node-postgres/test.sh
index 2b43b482..6ad25cdb 100755
--- a/test/javascript-node-postgres/test.sh
+++ b/test/javascript-node-postgres/test.sh
@@ -3,6 +3,9 @@ cd $(dirname "$0")
 
 source test-utils.sh node
 
+check "corepack_setup" bash -c 'sudo npm install --global --force corepack@0.36.0 && corepack_path=$(command -v corepack) && sudo env "PATH=$PATH" "$corepack_path" enable && "$corepack_path" prepare yarn@4.9.4 --activate'
+check "yarn_version_new" yarn --version
+
 # Remote - Containers does not auto-sync UID/GID for Docker Compose,
 # so make sure test project prvs match the non-root user in the container.
 fixTestProjectFolderPrivs
@@ -14,6 +17,7 @@ checkCommon
 checkExtension "dbaeumer.vscode-eslint"
 check "node" node --version
 sudo rm -f yarn.lock
+touch yarn.lock
 check "yarn" yarn install
 sudo rm -f package-lock.json
 check "npm" npm install
diff --git a/test/javascript-node/test.sh b/test/javascript-node/test.sh
index 875cb87f..7da9f63b 100755
--- a/test/javascript-node/test.sh
+++ b/test/javascript-node/test.sh
@@ -3,6 +3,9 @@ cd $(dirname "$0")
 
 source test-utils.sh node
 
+check "corepack_setup" bash -c 'sudo npm install --global --force corepack@0.36.0 && corepack_path=$(command -v corepack) && sudo env "PATH=$PATH" "$corepack_path" enable && "$corepack_path" prepare yarn@4.9.4 --activate'
+check "yarn_version_new" yarn --version
+
 # Run common tests
 checkCommon
 
@@ -10,6 +13,7 @@ checkCommon
 checkExtension "dbaeumer.vscode-eslint"
 check "node" node --version
 sudo rm -f yarn.lock
+touch yarn.lock
 check "yarn" yarn install
 sudo rm -f package-lock.json
 check "npm" npm install
diff --git a/test/typescript-node/test.sh b/test/typescript-node/test.sh
index c438519e..59166ded 100755
--- a/test/typescript-node/test.sh
+++ b/test/typescript-node/test.sh
@@ -3,6 +3,10 @@ cd $(dirname "$0")
 
 source test-utils.sh node
 
+check "corepack_setup" bash -c 'sudo npm install --global --force corepack@0.36.0 && corepack_path=$(command -v corepack) && sudo env "PATH=$PATH" "$corepack_path" enable && "$corepack_path" prepare yarn@4.9.4 --activate'
+export YARN_NODE_LINKER=node-modules
+check "yarn_version_new" yarn --version
+
 # Run common tests
 checkCommon
 
@@ -10,6 +14,7 @@ checkCommon
 checkExtension "dbaeumer.vscode-eslint"
 check "node" node --version
 sudo rm -f yarn.lock
+touch yarn.lock
 check "yarn" yarn install
 sudo rm -f package-lock.json
 check "eslint" eslint --no-warn-ignored src/server.ts