diff --git a/s3api/controllers/base.go b/s3api/controllers/base.go
index 00e5ec5c..d9662fcc 100644
--- a/s3api/controllers/base.go
+++ b/s3api/controllers/base.go
@@ -3189,6 +3189,20 @@ func (c S3ApiController) CreateActions(ctx *fiber.Ctx) error {
 				})
 		}
 
+		if len(data.Parts) == 0 {
+			if c.debug {
+				log.Println("empty parts provided for complete multipart upload")
+			}
+			return SendXMLResponse(ctx, nil,
+				s3err.GetAPIError(s3err.ErrEmptyParts),
+				&MetaOpts{
+					Logger:      c.logger,
+					MetricsMng:  c.mm,
+					Action:      metrics.ActionCompleteMultipartUpload,
+					BucketOwner: parsedAcl.Owner,
+				})
+		}
+
 		err = auth.VerifyAccess(ctx.Context(), c.be,
 			auth.AccessOptions{
 				Readonly:      c.readonly,
diff --git a/s3api/controllers/base_test.go b/s3api/controllers/base_test.go
index 635af42a..598056e0 100644
--- a/s3api/controllers/base_test.go
+++ b/s3api/controllers/base_test.go
@@ -1713,6 +1713,19 @@ func TestS3ApiController_CreateActions(t *testing.T) {
 		</SelectObjectContentRequest>
 	`
 
+	completMpBody := `
+		<CompleteMultipartUpload xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
+			<Part>
+				<ETag>etag</ETag>
+				<PartNumber>1</PartNumber>
+			</Part>
+		</CompleteMultipartUpload>
+	`
+
+	completMpEmptyBody := `
+		<CompleteMultipartUpload xmlns="http://s3.amazonaws.com/doc/2006-03-01/"></CompleteMultipartUpload>
+	`
+
 	app.Use(func(ctx *fiber.Ctx) error {
 		ctx.Locals("account", auth.Account{Access: "valid access"})
 		ctx.Locals("isRoot", true)
@@ -1765,11 +1778,20 @@ func TestS3ApiController_CreateActions(t *testing.T) {
 			wantErr:    false,
 			statusCode: 400,
 		},
+		{
+			name: "Complete-multipart-upload-empty-parts",
+			app:  app,
+			args: args{
+				req: httptest.NewRequest(http.MethodPost, "/my-bucket/my-key?uploadId=23423", strings.NewReader(completMpEmptyBody)),
+			},
+			wantErr:    false,
+			statusCode: 400,
+		},
 		{
 			name: "Complete-multipart-upload-success",
 			app:  app,
 			args: args{
-				req: httptest.NewRequest(http.MethodPost, "/my-bucket/my-key?uploadId=23423", strings.NewReader(`<root><key>body</key></root>`)),
+				req: httptest.NewRequest(http.MethodPost, "/my-bucket/my-key?uploadId=23423", strings.NewReader(completMpBody)),
 			},
 			wantErr:    false,
 			statusCode: 200,
diff --git a/s3err/s3err.go b/s3err/s3err.go
index 4d0d9712..3db27633 100644
--- a/s3err/s3err.go
+++ b/s3err/s3err.go
@@ -72,6 +72,7 @@ const (
 	ErrInvalidPartNumberMarker
 	ErrInvalidObjectAttributes
 	ErrInvalidPart
+	ErrEmptyParts
 	ErrInvalidPartNumber
 	ErrInternalError
 	ErrInvalidCopyDest
@@ -253,6 +254,11 @@ var errorCodeResponse = map[ErrorCode]APIError{
 		Description:    "One or more of the specified parts could not be found.  The part may not have been uploaded, or the specified entity tag may not match the part's entity tag.",
 		HTTPStatusCode: http.StatusBadRequest,
 	},
+	ErrEmptyParts: {
+		Code:           "InvalidRequest",
+		Description:    "You must specify at least one part",
+		HTTPStatusCode: http.StatusBadRequest,
+	},
 	ErrInvalidPartNumber: {
 		Code:           "InvalidArgument",
 		Description:    "Part number must be an integer between 1 and 10000, inclusive.",
diff --git a/tests/integration/group-tests.go b/tests/integration/group-tests.go
index bdbc5459..6c7b9c30 100644
--- a/tests/integration/group-tests.go
+++ b/tests/integration/group-tests.go
@@ -320,6 +320,7 @@ func TestCompleteMultipartUpload(s *S3Conf) {
 	CompletedMultipartUpload_non_existing_bucket(s)
 	CompleteMultipartUpload_invalid_part_number(s)
 	CompleteMultipartUpload_invalid_ETag(s)
+	CompleteMultipartUpload_empty_parts(s)
 	CompleteMultipartUpload_success(s)
 	if !s.azureTests {
 		CompleteMultipartUpload_racey_success(s)
@@ -849,6 +850,7 @@ func GetIntTests() IntTests {
 		"CompletedMultipartUpload_non_existing_bucket":                        CompletedMultipartUpload_non_existing_bucket,
 		"CompleteMultipartUpload_invalid_part_number":                         CompleteMultipartUpload_invalid_part_number,
 		"CompleteMultipartUpload_invalid_ETag":                                CompleteMultipartUpload_invalid_ETag,
+		"CompleteMultipartUpload_empty_parts":                                 CompleteMultipartUpload_empty_parts,
 		"CompleteMultipartUpload_success":                                     CompleteMultipartUpload_success,
 		"CompleteMultipartUpload_racey_success":                               CompleteMultipartUpload_racey_success,
 		"PutBucketAcl_non_existing_bucket":                                    PutBucketAcl_non_existing_bucket,
diff --git a/tests/integration/tests.go b/tests/integration/tests.go
index 2ad465fc..78ec3895 100644
--- a/tests/integration/tests.go
+++ b/tests/integration/tests.go
@@ -7327,6 +7327,38 @@ func CompleteMultipartUpload_invalid_ETag(s *S3Conf) error {
 	})
 }
 
+func CompleteMultipartUpload_empty_parts(s *S3Conf) error {
+	testName := "CompleteMultipartUpload_empty_parts"
+	return actionHandler(s, testName, func(s3client *s3.Client, bucket string) error {
+		obj := "my-obj"
+		mp, err := createMp(s3client, bucket, obj)
+		if err != nil {
+			return err
+		}
+
+		_, _, err = uploadParts(s3client, 5*1024*1024, 1, bucket, obj, *mp.UploadId)
+		if err != nil {
+			return err
+		}
+
+		ctx, cancel := context.WithTimeout(context.Background(), shortTimeout)
+		_, err = s3client.CompleteMultipartUpload(ctx, &s3.CompleteMultipartUploadInput{
+			Bucket:   &bucket,
+			Key:      &obj,
+			UploadId: mp.UploadId,
+			MultipartUpload: &types.CompletedMultipartUpload{
+				Parts: []types.CompletedPart{}, // empty parts list
+			},
+		})
+		cancel()
+		if err := checkApiErr(err, s3err.GetAPIError(s3err.ErrEmptyParts)); err != nil {
+			return err
+		}
+
+		return nil
+	})
+}
+
 func CompleteMultipartUpload_success(s *S3Conf) error {
 	testName := "CompleteMultipartUpload_success"
 	return actionHandler(s, testName, func(s3client *s3.Client, bucket string) error {