[p8donald]

If I contribute code to an open source project under the BSD 2-Clause license and don't sign any contributor license agreement, can the maintainer relicense the code without getting my permission?

[junon]

Yes, unless they change the copyright. You own the copyright to your code contribution. The license only states how the copyrighted code can be used.

[njharman]

Sure, anyone can do anything. It would be up to you (and hopefully a lawyer) to then sue them and let judge/jury decide. Or, convince authorities that some criminal law was violated and they should investigate.

Both of which are hard and/or expensive. So most rely on public shame. Out them on social media and foment outrage.

[colejohnson66]

In the US, generally no.