diff --git a/.github/workflows/README.md b/.github/workflows/README.md
index de0f34067..bf781e357 100644
--- a/.github/workflows/README.md
+++ b/.github/workflows/README.md
@@ -52,7 +52,7 @@ Runs comprehensive quality checks on every pull request and push to main branch.
 
 ### Required Variables
 
-- `GO_VERSION` (default: 1.25)
+- `GO_VERSION` (default: 1.26.6)
 
 ### Example
 
diff --git a/.github/workflows/pre-commit.yml b/.github/workflows/pre-commit.yml
index 9a64f2490..7744f9d37 100644
--- a/.github/workflows/pre-commit.yml
+++ b/.github/workflows/pre-commit.yml
@@ -32,7 +32,10 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6.4.0
         with:
-          go-version: "1.26.6"
+          # Read from go.mod rather than a hardcoded string, matching
+          # aws_sanity / azure_sanity / database-migration. One fewer place the
+          # Go version has to be bumped by hand (issue #1833).
+          go-version-file: go.mod
 
       - name: Set up Node.js
         uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 1d1833349..491072bbd 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -48,7 +48,7 @@ By participating in this project, you agree to maintain a respectful and inclusi
 
 ### Prerequisites
 
-- Go 1.23 or later
+- Go 1.26.6 or later (the floor set by the `go` directive in `go.mod`)
 - AWS/Azure/GCP credentials for integration testing
 - Git
 
@@ -88,7 +88,9 @@ from a copy of the committed `go.work` and append your active worktrees:
 
 ```go
 // go.work.local -- gitignored, developer-local
-go 1.25.0
+// Keep this `go` line at or above the modules' own directive, otherwise the
+// workspace is rejected. Copy it from the committed go.work.
+go 1.26.6
 
 use (
     .
diff --git a/Dockerfile b/Dockerfile
index 6e398cef8..6512386f0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,10 +12,10 @@ ARG TARGETOS=linux
 # Build stage
 # Image pinned to a SHA256 digest for reproducible builds — a registry
 # tag mutation (Docker Hub allows re-tagging) cannot poison this build.
-# To refresh: `docker buildx imagetools inspect golang:1.26.5-alpine3.24`
+# To refresh: `docker buildx imagetools inspect golang:1.26.6-alpine3.24`
 # (or use the Docker Hub API tags endpoint) and update the digest below.
 # A Renovate / Dependabot config can automate this if desired.
-FROM --platform=$BUILDPLATFORM golang:1.26.5-alpine3.24@sha256:0178a641fbb4858c5f1b48e34bdaabe0350a330a1b1149aabd498d0699ff5fb2 AS builder
+FROM --platform=$BUILDPLATFORM golang:1.26.6-alpine3.24@sha256:3889b425f035be855a72fb4755265311293b6d414521f0a519d819df32222d83 AS builder
 
 # Re-declare args for use in this stage
 ARG TARGETARCH
@@ -33,25 +33,27 @@ ARG BUILD_DATE
 RUN apk add --no-cache \
     git \
     ca-certificates \
-    postgresql-client \
-    curl
+    postgresql-client
 
 # Set shell with pipefail for safer pipe operations
 SHELL ["/bin/ash", "-eo", "pipefail", "-c"]
 
-# Install golang-migrate for database migrations (architecture-aware, checksum-verified)
-RUN MIGRATE_ARCH=$([ "$TARGETARCH" = "arm64" ] && echo "arm64" || echo "amd64") && \
-    if [ "$MIGRATE_ARCH" = "arm64" ]; then \
-      MIGRATE_SHA256="2fea2455c0f3f07cc3f4b98471c951ad1a716059574b20b6416bd1e9058751c5"; \
-    else \
-      MIGRATE_SHA256="2ac648fbd1b127b69ab5a7b33cf96212178f71e22379fc50573630c6f4c7ce18"; \
-    fi && \
-    curl -Lo migrate.tar.gz "https://github.com/golang-migrate/migrate/releases/download/v4.19.1/migrate.linux-${MIGRATE_ARCH}.tar.gz" && \
-    echo "${MIGRATE_SHA256}  migrate.tar.gz" | sha256sum -c - && \
-    tar xzf migrate.tar.gz && \
-    mv migrate /usr/local/bin/migrate && \
-    chmod +x /usr/local/bin/migrate && \
-    rm migrate.tar.gz
+# Build golang-migrate from source on this stage's pinned Go toolchain, the same
+# way `make install-tools` does. Upstream's prebuilt release tarballs carry
+# whatever toolchain upstream built them with (v4.19.1 ships go1.25.4), which is
+# how issue #1833's stdlib CVEs reached the runtime image, where entrypoint.sh
+# runs `migrate up` against the database on every container start.
+# `go install` refuses GOBIN when cross-compiling and writes to
+# bin/${GOOS}_${GOARCH}/ instead, so resolve both layouts; the final `mv` fails
+# the build if neither produced a binary.
+# Keep this version in step with MIGRATE_VERSION in the Makefile.
+RUN CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} \
+      go install -tags=postgres -ldflags="-s -w -X main.Version=v4.19.1" \
+      github.com/golang-migrate/migrate/v4/cmd/migrate@v4.19.1 && \
+    GOPATH_BIN="$(go env GOPATH)/bin" && \
+    MIGRATE_BIN="${GOPATH_BIN}/${TARGETOS}_${TARGETARCH}/migrate" && \
+    { [ -x "${MIGRATE_BIN}" ] || MIGRATE_BIN="${GOPATH_BIN}/migrate"; } && \
+    mv "${MIGRATE_BIN}" /usr/local/bin/migrate
 
 WORKDIR /app
 
diff --git a/Dockerfile.dev b/Dockerfile.dev
index ff3ccb8fb..5537bd61a 100644
--- a/Dockerfile.dev
+++ b/Dockerfile.dev
@@ -1,11 +1,11 @@
 # Development Dockerfile with hot reload using Air
 # Image pinned to a SHA256 digest for reproducible builds; a registry
 # tag mutation (Docker Hub allows re-tagging) cannot poison this build.
-# To refresh: `docker buildx imagetools inspect golang:1.26.5-alpine3.24`
+# To refresh: `docker buildx imagetools inspect golang:1.26.6-alpine3.24`
 # (or use the Docker Hub API tags endpoint) and update the digest below.
 # A Renovate / Dependabot config can automate this if desired.
 # Keep this digest in sync with the builder stage in Dockerfile.
-FROM golang:1.26.5-alpine3.24@sha256:0178a641fbb4858c5f1b48e34bdaabe0350a330a1b1149aabd498d0699ff5fb2 AS development
+FROM golang:1.26.6-alpine3.24@sha256:3889b425f035be855a72fb4755265311293b6d414521f0a519d819df32222d83 AS development
 
 # Install development tools and Air for hot reload
 RUN apk add --no-cache \
diff --git a/Dockerfile.test b/Dockerfile.test
index a31d233d8..d7560d01f 100644
--- a/Dockerfile.test
+++ b/Dockerfile.test
@@ -5,7 +5,7 @@
 #
 # Base image pinned by digest for the same supply-chain reasons as Dockerfile;
 # keep the digest in sync with the builder stage there.
-FROM golang:1.26.5-alpine3.24@sha256:0178a641fbb4858c5f1b48e34bdaabe0350a330a1b1149aabd498d0699ff5fb2
+FROM golang:1.26.6-alpine3.24@sha256:3889b425f035be855a72fb4755265311293b6d414521f0a519d819df32222d83
 
 # Run the suite as a non-root user (trivy DS-0002). tests/e2e is a stdlib-only
 # module so no module downloads are needed; GOCACHE lives in the user's home,
diff --git a/README.md b/README.md
index 49e52c195..187689000 100644
--- a/README.md
+++ b/README.md
@@ -598,7 +598,7 @@ runtimes.
 
 - Terraform >= 1.6.0
 - Docker with buildx
-- Go 1.25+
+- Go 1.26.6+
 - Cloud CLI authenticated: `aws`, `gcloud`, or `az`
 
 #### Quick deploy (using the helper script)
@@ -682,7 +682,7 @@ reload, and debugging workflows.
 
 ### Prerequisites
 
-- Go 1.23 or later
+- Go 1.26.6 or later
 - AWS/Azure/GCP credentials for integration testing
 
 ### Building
diff --git a/docs/DEPLOYMENT.md b/docs/DEPLOYMENT.md
index 7c94913ef..764ab5c85 100644
--- a/docs/DEPLOYMENT.md
+++ b/docs/DEPLOYMENT.md
@@ -56,7 +56,7 @@ Terraform automatically handles: Docker image build/push (via build module), fro
 
 - Docker with buildx support
 - Terraform >= 1.6.0
-- Go 1.25+
+- Go 1.26.6+
 - Cloud CLI configured: `aws`, `az`, or `gcloud`
 
 ---
diff --git a/docs/DEVELOPMENT.md b/docs/DEVELOPMENT.md
index 5d6e9ae02..3dafeaa65 100644
--- a/docs/DEVELOPMENT.md
+++ b/docs/DEVELOPMENT.md
@@ -3,7 +3,7 @@
 ## Prerequisites
 
 - Docker and Docker Compose
-- Go 1.25+
+- Go 1.26.6+
 - Node.js and npm (for frontend development)
 - Make (optional, for convenience commands)
 
diff --git a/go.mod b/go.mod
index 1d1e06f6d..9a22638fa 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/LeanerCloud/CUDly
 
-go 1.26.5
+go 1.26.6
 
 require (
 	github.com/aws/aws-sdk-go-v2 v1.41.5
diff --git a/go.work b/go.work
index 689cc213c..3b2ce4f44 100644
--- a/go.work
+++ b/go.work
@@ -1,4 +1,4 @@
-go 1.26.5
+go 1.26.6
 
 use (
 	.
diff --git a/pkg/go.mod b/pkg/go.mod
index 9b8192c16..565aa5de6 100644
--- a/pkg/go.mod
+++ b/pkg/go.mod
@@ -1,6 +1,6 @@
 module github.com/LeanerCloud/CUDly/pkg
 
-go 1.26.5
+go 1.26.6
 
 // This module contains shared types, provider interfaces, and the exchange package.
 // The exchange package has AWS SDK dependencies for RI exchange operations.
diff --git a/providers/aws/go.mod b/providers/aws/go.mod
index f7e3b04bd..f46aa7b46 100644
--- a/providers/aws/go.mod
+++ b/providers/aws/go.mod
@@ -1,6 +1,6 @@
 module github.com/LeanerCloud/CUDly/providers/aws
 
-go 1.26.5
+go 1.26.6
 
 require (
 	github.com/LeanerCloud/CUDly/pkg v0.0.0
diff --git a/providers/azure/go.mod b/providers/azure/go.mod
index d85f5d4b2..fb071a2c3 100644
--- a/providers/azure/go.mod
+++ b/providers/azure/go.mod
@@ -1,6 +1,6 @@
 module github.com/LeanerCloud/CUDly/providers/azure
 
-go 1.26.5
+go 1.26.6
 
 require (
 	github.com/Azure/azure-sdk-for-go/sdk/azcore v1.21.1
diff --git a/providers/gcp/go.mod b/providers/gcp/go.mod
index 1de89c80e..f7580550d 100644
--- a/providers/gcp/go.mod
+++ b/providers/gcp/go.mod
@@ -1,6 +1,6 @@
 module github.com/LeanerCloud/CUDly/providers/gcp
 
-go 1.26.5
+go 1.26.6
 
 require (
 	cloud.google.com/go/compute v1.54.0