diff --git a/docker-setup.sh b/docker-setup.sh
index 1d2f5e53fd..00c3cf1924 100755
--- a/docker-setup.sh
+++ b/docker-setup.sh
@@ -8,6 +8,11 @@ IMAGE_NAME="${OPENCLAW_IMAGE:-openclaw:local}"
 EXTRA_MOUNTS="${OPENCLAW_EXTRA_MOUNTS:-}"
 HOME_VOLUME_NAME="${OPENCLAW_HOME_VOLUME:-}"
 
+fail() {
+  echo "ERROR: $*" >&2
+  exit 1
+}
+
 require_cmd() {
   if ! command -v "$1" >/dev/null 2>&1; then
     echo "Missing dependency: $1" >&2
@@ -15,6 +20,44 @@ require_cmd() {
   fi
 }
 
+contains_disallowed_chars() {
+  local value="$1"
+  [[ "$value" == *$'\n'* || "$value" == *$'\r'* || "$value" == *$'\t'* ]]
+}
+
+validate_mount_path_value() {
+  local label="$1"
+  local value="$2"
+  if [[ -z "$value" ]]; then
+    fail "$label cannot be empty."
+  fi
+  if contains_disallowed_chars "$value"; then
+    fail "$label contains unsupported control characters."
+  fi
+  if [[ "$value" =~ [[:space:]] ]]; then
+    fail "$label cannot contain whitespace."
+  fi
+}
+
+validate_named_volume() {
+  local value="$1"
+  if [[ ! "$value" =~ ^[A-Za-z0-9][A-Za-z0-9_.-]*$ ]]; then
+    fail "OPENCLAW_HOME_VOLUME must match [A-Za-z0-9][A-Za-z0-9_.-]* when using a named volume."
+  fi
+}
+
+validate_mount_spec() {
+  local mount="$1"
+  if contains_disallowed_chars "$mount"; then
+    fail "OPENCLAW_EXTRA_MOUNTS entries cannot contain control characters."
+  fi
+  # Keep mount specs strict to avoid YAML structure injection.
+  # Expected format: source:target[:options]
+  if [[ ! "$mount" =~ ^[^[:space:],:]+:[^[:space:],:]+(:[^[:space:],:]+)?$ ]]; then
+    fail "Invalid mount format '$mount'. Expected source:target[:options] without spaces."
+  fi
+}
+
 require_cmd docker
 if ! docker compose version >/dev/null 2>&1; then
   echo "Docker Compose not available (try: docker compose version)" >&2
@@ -24,6 +67,19 @@ fi
 OPENCLAW_CONFIG_DIR="${OPENCLAW_CONFIG_DIR:-$HOME/.openclaw}"
 OPENCLAW_WORKSPACE_DIR="${OPENCLAW_WORKSPACE_DIR:-$HOME/.openclaw/workspace}"
 
+validate_mount_path_value "OPENCLAW_CONFIG_DIR" "$OPENCLAW_CONFIG_DIR"
+validate_mount_path_value "OPENCLAW_WORKSPACE_DIR" "$OPENCLAW_WORKSPACE_DIR"
+if [[ -n "$HOME_VOLUME_NAME" ]]; then
+  if [[ "$HOME_VOLUME_NAME" == *"/"* ]]; then
+    validate_mount_path_value "OPENCLAW_HOME_VOLUME" "$HOME_VOLUME_NAME"
+  else
+    validate_named_volume "$HOME_VOLUME_NAME"
+  fi
+fi
+if contains_disallowed_chars "$EXTRA_MOUNTS"; then
+  fail "OPENCLAW_EXTRA_MOUNTS cannot contain control characters."
+fi
+
 mkdir -p "$OPENCLAW_CONFIG_DIR"
 mkdir -p "$OPENCLAW_WORKSPACE_DIR"
 
@@ -57,6 +113,9 @@ write_extra_compose() {
   local home_volume="$1"
   shift
   local mount
+  local gateway_home_mount
+  local gateway_config_mount
+  local gateway_workspace_mount
 
   cat >"$EXTRA_COMPOSE_FILE" <<'YAML'
 services:
@@ -65,12 +124,19 @@ services:
 YAML
 
   if [[ -n "$home_volume" ]]; then
-    printf '      - %s:/home/node\n' "$home_volume" >>"$EXTRA_COMPOSE_FILE"
-    printf '      - %s:/home/node/.openclaw\n' "$OPENCLAW_CONFIG_DIR" >>"$EXTRA_COMPOSE_FILE"
-    printf '      - %s:/home/node/.openclaw/workspace\n' "$OPENCLAW_WORKSPACE_DIR" >>"$EXTRA_COMPOSE_FILE"
+    gateway_home_mount="${home_volume}:/home/node"
+    gateway_config_mount="${OPENCLAW_CONFIG_DIR}:/home/node/.openclaw"
+    gateway_workspace_mount="${OPENCLAW_WORKSPACE_DIR}:/home/node/.openclaw/workspace"
+    validate_mount_spec "$gateway_home_mount"
+    validate_mount_spec "$gateway_config_mount"
+    validate_mount_spec "$gateway_workspace_mount"
+    printf '      - %s\n' "$gateway_home_mount" >>"$EXTRA_COMPOSE_FILE"
+    printf '      - %s\n' "$gateway_config_mount" >>"$EXTRA_COMPOSE_FILE"
+    printf '      - %s\n' "$gateway_workspace_mount" >>"$EXTRA_COMPOSE_FILE"
   fi
 
   for mount in "$@"; do
+    validate_mount_spec "$mount"
     printf '      - %s\n' "$mount" >>"$EXTRA_COMPOSE_FILE"
   done
 
@@ -80,16 +146,18 @@ YAML
 YAML
 
   if [[ -n "$home_volume" ]]; then
-    printf '      - %s:/home/node\n' "$home_volume" >>"$EXTRA_COMPOSE_FILE"
-    printf '      - %s:/home/node/.openclaw\n' "$OPENCLAW_CONFIG_DIR" >>"$EXTRA_COMPOSE_FILE"
-    printf '      - %s:/home/node/.openclaw/workspace\n' "$OPENCLAW_WORKSPACE_DIR" >>"$EXTRA_COMPOSE_FILE"
+    printf '      - %s\n' "$gateway_home_mount" >>"$EXTRA_COMPOSE_FILE"
+    printf '      - %s\n' "$gateway_config_mount" >>"$EXTRA_COMPOSE_FILE"
+    printf '      - %s\n' "$gateway_workspace_mount" >>"$EXTRA_COMPOSE_FILE"
   fi
 
   for mount in "$@"; do
+    validate_mount_spec "$mount"
     printf '      - %s\n' "$mount" >>"$EXTRA_COMPOSE_FILE"
   done
 
   if [[ -n "$home_volume" && "$home_volume" != *"/"* ]]; then
+    validate_named_volume "$home_volume"
     cat >>"$EXTRA_COMPOSE_FILE" <<YAML
 volumes:
   ${home_volume}:
diff --git a/docs/install/docker.md b/docs/install/docker.md
index ca4ee842ec..9cba10bf7d 100644
--- a/docs/install/docker.md
+++ b/docs/install/docker.md
@@ -129,6 +129,7 @@ export OPENCLAW_EXTRA_MOUNTS="$HOME/.codex:/home/node/.codex:ro,$HOME/github:/ho
 Notes:
 
 - Paths must be shared with Docker Desktop on macOS/Windows.
+- Each entry must be `source:target[:options]` with no spaces, tabs, or newlines.
 - If you edit `OPENCLAW_EXTRA_MOUNTS`, rerun `docker-setup.sh` to regenerate the
   extra compose file.
 - `docker-compose.extra.yml` is generated. Don’t hand-edit it.
@@ -158,6 +159,7 @@ export OPENCLAW_EXTRA_MOUNTS="$HOME/.codex:/home/node/.codex:ro,$HOME/github:/ho
 
 Notes:
 
+- Named volumes must match `^[A-Za-z0-9][A-Za-z0-9_.-]*$`.
 - If you change `OPENCLAW_HOME_VOLUME`, rerun `docker-setup.sh` to regenerate the
   extra compose file.
 - The named volume persists until removed with `docker volume rm <name>`.
diff --git a/src/docker-setup.test.ts b/src/docker-setup.test.ts
index a0ff66350a..14dcd72b81 100644
--- a/src/docker-setup.test.ts
+++ b/src/docker-setup.test.ts
@@ -137,6 +137,60 @@ describe("docker-setup.sh", () => {
     expect(log).toContain("--build-arg OPENCLAW_DOCKER_APT_PACKAGES=ffmpeg build-essential");
   });
 
+  it("rejects injected multiline OPENCLAW_EXTRA_MOUNTS values", async () => {
+    if (!sandbox) {
+      throw new Error("sandbox missing");
+    }
+
+    const result = spawnSync("bash", [sandbox.scriptPath], {
+      cwd: sandbox.rootDir,
+      env: createEnv(sandbox, {
+        OPENCLAW_EXTRA_MOUNTS: "/tmp:/tmp\n  evil-service:\n    image: alpine",
+      }),
+      encoding: "utf8",
+      stdio: ["ignore", "ignore", "pipe"],
+    });
+
+    expect(result.status).not.toBe(0);
+    expect(result.stderr).toContain("OPENCLAW_EXTRA_MOUNTS cannot contain control characters");
+  });
+
+  it("rejects invalid OPENCLAW_EXTRA_MOUNTS mount format", async () => {
+    if (!sandbox) {
+      throw new Error("sandbox missing");
+    }
+
+    const result = spawnSync("bash", [sandbox.scriptPath], {
+      cwd: sandbox.rootDir,
+      env: createEnv(sandbox, {
+        OPENCLAW_EXTRA_MOUNTS: "bad mount spec",
+      }),
+      encoding: "utf8",
+      stdio: ["ignore", "ignore", "pipe"],
+    });
+
+    expect(result.status).not.toBe(0);
+    expect(result.stderr).toContain("Invalid mount format");
+  });
+
+  it("rejects invalid OPENCLAW_HOME_VOLUME names", async () => {
+    if (!sandbox) {
+      throw new Error("sandbox missing");
+    }
+
+    const result = spawnSync("bash", [sandbox.scriptPath], {
+      cwd: sandbox.rootDir,
+      env: createEnv(sandbox, {
+        OPENCLAW_HOME_VOLUME: "bad name",
+      }),
+      encoding: "utf8",
+      stdio: ["ignore", "ignore", "pipe"],
+    });
+
+    expect(result.status).not.toBe(0);
+    expect(result.stderr).toContain("OPENCLAW_HOME_VOLUME must match");
+  });
+
   it("avoids associative arrays so the script remains Bash 3.2-compatible", async () => {
     const script = await readFile(join(repoRoot, "docker-setup.sh"), "utf8");
     expect(script).not.toMatch(/^\s*declare -A\b/m);