fish (aka fish-shell) 1.16.0 before 2.1.1 does not properly check the credentials, which allows local users to gain privileges via the universal variable socket, related to /tmp/fishd.socket.user permissions.
| Software | From | Fixed in |
|---|---|---|
| fishshell / fish | 1.16.0 | 1.16.0.x |
| fishshell / fish | 2.0.0 | 2.0.0.x |