fix: remediate Dependabot and Docker Scout security vulnerabilities (#265)

- Upgrade Docker base image from node:20-alpine to node:22-alpine
  (Node 22.22.2, Alpine 3.23.3) to resolve 31 CVEs flagged by Docker Scout
- Add apk upgrade to runtime stage for latest Alpine security patches
- Force dompurify to 3.3.3 via npm overrides to fix two XSS advisories
  (transitive dep of monaco-editor pinned at 3.2.7)

CHANGELOG.md

@@ -13,6 +13,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Security
+
+* **docker:** upgrade base image from `node:20-alpine` to `node:22-alpine` (Node 22.22.2 on Alpine 3.23.3) to remediate 31 CVEs (1 Critical, multiple High/Medium/Low) flagged by Docker Scout against the previous `node:20-alpine` base.
+* **docker:** add `apk upgrade --no-cache` to runtime stage to ensure all Alpine system packages are at their latest patched versions at build time.
+* **deps:** force `dompurify` to 3.3.3 via npm overrides to resolve two Dependabot advisories (Mutation-XSS via Re-Contextualization and Cross-site Scripting) in the transitive dependency pulled by `monaco-editor`.
+
 ### Fixed
 
 * **stacks:** resolve permission denied error when deleting stacks with root-owned files. Sencho now falls back to Docker-based cleanup when the normal deletion fails due to EACCES/EPERM, handling directories created by Docker Compose as root without requiring elevated privileges.

Dockerfile

@@ -5,7 +5,7 @@ FROM --platform=$BUILDPLATFORM tonistiigi/xx AS xx
 # Stage 1: Build Frontend
 # Runs on the BUILD platform (amd64) - frontend has no native modules so the
 # compiled output (JS/CSS/HTML) is entirely platform-agnostic.
-FROM --platform=$BUILDPLATFORM node:20-alpine AS frontend-builder
+FROM --platform=$BUILDPLATFORM node:22-alpine AS frontend-builder
 
 WORKDIR /app/frontend
 
@@ -21,7 +21,7 @@ RUN npm run build
 
 # Stage 2: Compile TypeScript
 # Runs on the BUILD platform (amd64) - tsc output is platform-agnostic JS.
-FROM --platform=$BUILDPLATFORM node:20-alpine AS backend-builder
+FROM --platform=$BUILDPLATFORM node:22-alpine AS backend-builder
 
 WORKDIR /app/backend
 
@@ -41,7 +41,7 @@ RUN npm run build
 # tonistiigi/xx + clang as the cross-compiler.
 # This avoids the Node.js v20 SIGILL crash that occurs when npm runs
 # under QEMU because QEMU lacks ARMv8.1 LSE atomic instruction support.
-FROM --platform=$BUILDPLATFORM node:20-alpine AS prod-deps
+FROM --platform=$BUILDPLATFORM node:22-alpine AS prod-deps
 
 # Copy xx cross-compilation tools into this stage
 COPY --from=xx / /
@@ -89,10 +89,12 @@ RUN if [ "$TARGETARCH" = "$BUILDARCH" ]; then \
 
 # Stage 4: Production runtime
 # Runs on the TARGET platform - no compilation happens here.
-FROM node:20-alpine
+FROM node:22-alpine
 
-# Install Docker CLI, Docker Compose CLI, and Bash for Host Console
-RUN apk add --no-cache docker-cli docker-cli-compose bash su-exec
+# Upgrade all Alpine system packages to pick up security patches, then install
+# Docker CLI, Docker Compose CLI, and Bash for Host Console
+RUN apk upgrade --no-cache && \
+    apk add --no-cache docker-cli docker-cli-compose bash su-exec
 
 WORKDIR /app
 

frontend/package-lock.json

@@ -3861,9 +3861,9 @@
       "license": "MIT"
     },
     "node_modules/dompurify": {
-      "version": "3.2.7",
-      "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.2.7.tgz",
-      "integrity": "sha512-WhL/YuveyGXJaerVlMYGWhvQswa7myDG17P7Vu65EWC05o8vfeNbvNf4d/BOvH99+ZW+LlQsc1GDKMa1vNK6dw==",
+      "version": "3.3.3",
+      "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.3.3.tgz",
+      "integrity": "sha512-Oj6pzI2+RqBfFG+qOaOLbFXLQ90ARpcGG6UePL82bJLtdsa6CYJD7nmiU8MW9nQNOtCHV3lZ/Bzq1X0QYbBZCA==",
       "license": "(MPL-2.0 OR Apache-2.0)",
       "optionalDependencies": {
         "@types/trusted-types": "^2.0.7"

frontend/package.json

@@ -53,6 +53,9 @@
     "xterm-addon-search": "^0.13.0",
     "xterm-addon-serialize": "^0.11.0"
   },
+  "overrides": {
+    "dompurify": "^3.3.3"
+  },
   "devDependencies": {
     "@eslint/js": "^10.0.1",
     "@tailwindcss/vite": "^4.2.2",