CVE-2026-63349 AnyIO run_process/open_process ignores extra_groups and can retain parent supplementary groups

AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. In 4.14.0, AnyIO accepts the POSIX extragroups argument in anyio.runprocess and anyio.openprocess, but openprocess forwards the group argument to the backend instead of extragroups...