Makeself on Gentoo is pretty outdated and misses relevant security feature like SHA256 checksuming. Please bump. Note: the patch seems no longer necessary.
Thank you for the report. It is in the pool of m-n packages. It is in the cue now. We will need some time to review the changes of the last 8 years upstream. Please vote for the ticket, if you need/use this package.
this has been fixed: https://github.com/gentoo/gentoo/pull/20243 https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=f3a6d0085159620af4f4bb8512f0f2d2af159211