A DESCRIPTION OF THE PROBLEM :
I don't think there is a better way to describe the problem better than the code itself.
Let's assume we have "comment.zip" with permissions "-rw-rw-r--" on Desktop, the code will change the permissions to "-rw-------"

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Just run the code.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Zip file permissions shouldn't change.
ACTUAL -
Zip file permissions change to "-rw-------"

---------- BEGIN SOURCE ----------
String zipPath = "/home/ahashem/Desktop/comment.zip";
    URI uri = URI.create("jar:file:" + zipPath);
    try (FileSystem fs = FileSystems.newFileSystem(uri, Collections.singletonMap("create", "true"))) {
        Path pathInZipFile = fs.getPath("comment.txt");
        Files.copy(Paths.get("/home/ahashem/Desktop/comment.txt"), pathInZipFile, StandardCopyOption.REPLACE_EXISTING);
    }
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
String zipPath = "/home/ahashem/Desktop/comment.zip";
    URI uri = URI.create("jar:file:" + zipPath);
    Set<PosixFilePermission> defaultPermissions = Files.getPosixFilePermissions(Paths.get(zipPath));
    try (FileSystem fs = FileSystems.newFileSystem(uri, Collections.singletonMap("create", "true"))) {
        Path pathInZipFile = fs.getPath("comment.txt");
        Files.copy(Paths.get("/home/ahashem/Desktop/comment.txt"), pathInZipFile, StandardCopyOption.REPLACE_EXISTING);
    }
    Files.setPosixFilePermissions(Paths.get(zipPath), defaultPermissions);

FREQUENCY : always