diff --git a/mock_ssh_test.go b/mock_ssh_test.go
index 4f29323..863489a 100644
--- a/mock_ssh_test.go
+++ b/mock_ssh_test.go
@@ -526,6 +526,7 @@ type sshRunner interface {
 	Run(ctx context.Context, cmd string) (string, string, int, error)
 	RunScript(ctx context.Context, script string) (string, string, int, error)
 	Upload(ctx context.Context, local io.Reader, remote string, mode fs.FileMode) error
+	Download(ctx context.Context, remote string) ([]byte, error)
 }
 
 type sshFileTransferRunner interface {
@@ -2011,6 +2012,7 @@ func moduleURIWithClient(_ *Executor, client sshRunner, args map[string]any) (*T
 	forceBasicAuth := getBoolArg(args, "force_basic_auth", false)
 	unixSocket := getStringArg(args, "unix_socket", "")
 	followRedirects := lower(getStringArg(args, "follow_redirects", "safe"))
+	src := getStringArg(args, "src", "")
 
 	if url == "" {
 		return nil, mockError("moduleURIWithClient", "uri: url required")
@@ -2047,7 +2049,13 @@ func moduleURIWithClient(_ *Executor, client sshRunner, args map[string]any) (*T
 	curlOpts = appendURIFollowRedirects(curlOpts, method, followRedirects)
 
 	// Body
-	if body := args["body"]; body != nil {
+	if src != "" {
+		bodyBytes, err := client.Download(context.Background(), src)
+		if err != nil {
+			return nil, mockWrap("moduleURIWithClient", "download src", err)
+		}
+		curlOpts = append(curlOpts, "-d", sprintf("%q", string(bodyBytes)))
+	} else if body := args["body"]; body != nil {
 		bodyText, err := renderURIBody(body, bodyFormat)
 		if err != nil {
 			return nil, mockWrap("moduleURIWithClient", "render body", err)
diff --git a/modules.go b/modules.go
index d13edf3..13604ff 100644
--- a/modules.go
+++ b/modules.go
@@ -2022,6 +2022,7 @@ func (e *Executor) moduleURI(ctx context.Context, client sshExecutorClient, args
 	forceBasicAuth := getBoolArg(args, "force_basic_auth", false)
 	unixSocket := getStringArg(args, "unix_socket", "")
 	followRedirects := lower(getStringArg(args, "follow_redirects", "safe"))
+	src := getStringArg(args, "src", "")
 
 	if url == "" {
 		return nil, coreerr.E("Executor.moduleURI", "url required", nil)
@@ -2060,7 +2061,13 @@ func (e *Executor) moduleURI(ctx context.Context, client sshExecutorClient, args
 	curlOpts = appendURIFollowRedirects(curlOpts, method, followRedirects)
 
 	// Body
-	if body := args["body"]; body != nil {
+	if src != "" {
+		bodyBytes, err := client.Download(ctx, src)
+		if err != nil {
+			return nil, coreerr.E("Executor.moduleURI", "download src", err)
+		}
+		curlOpts = append(curlOpts, "-d", sprintf("%q", string(bodyBytes)))
+	} else if body := args["body"]; body != nil {
 		bodyText, err := renderURIBody(body, bodyFormat)
 		if err != nil {
 			return nil, coreerr.E("Executor.moduleURI", "render body", err)
diff --git a/modules_adv_test.go b/modules_adv_test.go
index b776a88..820edfe 100644
--- a/modules_adv_test.go
+++ b/modules_adv_test.go
@@ -1689,6 +1689,26 @@ func TestModulesAdv_ModuleURI_Good_UsesUnixSocket(t *testing.T) {
 	assert.True(t, mock.hasExecuted(`--unix-socket '/var/run/docker.sock'`))
 }
 
+func TestModulesAdv_ModuleURI_Good_UsesSourceFileBody(t *testing.T) {
+	e, mock := newTestExecutorWithMock("host1")
+	require.NoError(t, mock.Upload(context.Background(), newReader("alpha=1&beta=2"), "/tmp/request-body.txt", 0644))
+	mock.expectCommand(`curl.*form\.example\.com`, "created\n201", "", 0)
+
+	result, err := moduleURIWithClient(e, mock, map[string]any{
+		"url":         "https://form.example.com/submit",
+		"method":      "POST",
+		"src":         "/tmp/request-body.txt",
+		"body_format": "json",
+		"status_code": 201,
+	})
+
+	require.NoError(t, err)
+	assert.False(t, result.Failed)
+	assert.Equal(t, 201, result.RC)
+	assert.True(t, mock.containsSubstring(`-d "alpha=1&beta=2"`))
+	assert.False(t, mock.containsSubstring("Content-Type: application/json"))
+}
+
 func TestModulesAdv_ModuleURI_Good_FormURLEncodedBody(t *testing.T) {
 	e, mock := newTestExecutorWithMock("host1")
 	mock.expectCommand(`curl.*form\.example\.com`, "created\n201", "", 0)