🛡️ RUSTSEC-2026-0128 — emap

Double-free and use-after-free in Keys::next()

Keys::next() uses ptr::read to move out the Option<V> by value, which

drops the contained V when V is non-Copy (e.g. String). This leaves a

dangling value in the map's storage slot. Subsequent get() operations on

that key return a dangling reference to already-freed memory.

This can be triggered through safe public APIs — Map::keys(),

Keys::next(), and Map::get() — with no unsafe required from the

caller. Under Miri, accessing the freed slot produces "Undefined Behavior:

pointer not dereferenceable: alloc has been freed, so this pointer is

dangling".