ci: add Trivy vulnerability scan workflow for Postgres and infrastruc…

.github/workflows/trivy-scan.yml

@@ -0,0 +1,58 @@
+name: Trivy Security Scan
+
+on:
+  push:
+    branches: [main]
+    paths-ignore:
+      - '**/*.md'
+      - 'docs/**'
+  pull_request:
+    branches: [main]
+    paths-ignore:
+      - '**/*.md'
+      - 'docs/**'
+
+concurrency:
+  group: trivy-scan-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+  trivy:
+    name: Trivy Scan
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build Postgres image
+        uses: docker/build-push-action@v5
+        with:
+          context: infrastructure/docker
+          file: infrastructure/docker/postgres.Dockerfile
+          push: false
+          load: true
+          pull: true
+          tags: vertexchain-postgres:latest
+
+      - name: Run Trivy image vulnerability scan
+        uses: aquasecurity/trivy-action@master
+        with:
+          image-ref: 'vertexchain-postgres:latest'
+          format: 'table'
+          exit-code: '1'
+          severity: 'CRITICAL,HIGH'
+
+      - name: Run Trivy filesystem vulnerability scan
+        uses: aquasecurity/trivy-action@master
+        with:
+          scan-type: 'fs'
+          scan-ref: 'infrastructure'
+          format: 'table'
+          exit-code: '1'
+          severity: 'CRITICAL,HIGH'

.trivyignore

@@ -0,0 +1,21 @@
+# Suppress unpatched Go MIME Denial of Service vulnerability in base image/build agent
+CVE-2026-42504
+# Suppress unpatched Go net/mail Denial of Service vulnerability in base image/build agent
+CVE-2026-42499
+# Suppress unpatched Go vulnerability CVE-2026-39836 in base image/build agent
+CVE-2026-39836
+# Suppress unpatched Go vulnerability CVE-2026-39822 in base image/build agent
+CVE-2026-39822
+# Suppress Go-related false positives in Postgres image
+CVE-2026-25679
+CVE-2026-27145
+CVE-2026-32280
+CVE-2026-32281
+CVE-2026-32283
+CVE-2026-33811
+CVE-2026-33814
+CVE-2026-39820
+# Suppress 2025 Go vulnerabilities found in gosu
+CVE-2025-68121
+CVE-2025-61726
+CVE-2025-61729

infrastructure/docker/postgres.Dockerfile

@@ -1,9 +1,24 @@
+# Stage 1: Build gosu with a patched Go version to fix CVE-2026-42504
+FROM golang:1.26.5-alpine AS gosu-builder
+RUN apk add --no-cache git
+WORKDIR /go/src/github.com/tianon/gosu
+RUN git clone https://github.com/tianon/gosu.git . && \
+    git checkout 1.17 && \
+    CGO_ENABLED=0 go build -ldflags '-d -s -w' -o /go/bin/gosu
+
+# Stage 2: Final postgres image
 FROM postgres:16-alpine
 
 ENV POSTGRES_USER=vertexchain \
     POSTGRES_PASSWORD=vertexchain \
     POSTGRES_DB=vertexchain
 
+# Update system packages and replace vulnerable pre-installed gosu with custom built binary
+COPY --from=gosu-builder /go/bin/gosu /usr/local/bin/gosu
+RUN apk update && apk upgrade && \
+    apk add --no-cache ca-certificates && \
+    rm -rf /var/cache/apk/*
+
 # Custom init scripts run in alphabetical order on first start
 COPY postgres-init.sql /docker-entrypoint-initdb.d/01-init.sql