Language: Java
Label: vulnerable
CWE: CWE-502 \u2014 Deserialization of Untrusted Data
The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid.

Code:
	public void testSet() throws Exception {
		HashSet<String> set = new HashSet<>();
		set.add("drölf");
		set.add("text");

		byte[] data = LPDataIOWrapper.collectData(output -> output.writeCollection(set, LPDataOutput::writeUTF));

		LPDataIOWrapper.provideData(data, input -> {
			assertEquals(set, input.readSet(LPDataInput::readUTF));

			assertEquals(BUFFER_EMPTY_MSG, 0, ((LPDataIOWrapper) input).localBuffer.readableBytes());
		});
	}