I mean there needs to be a limit, because hashing a password is, by design, resource intensive. Also, Lemmy uses bcrypt for password hashing which supports up to 72 bytes, so the limit can’t be any higher than that. It should probably be indicated somewhere though, I agree. I was also caught off guard by it but realistically 60 characters is more than enough… it’s more entropy than the hash you get out of it, if it’s random.

The web UI trims passwords to 60 characters. I assume Mlem doesn’t and the API doesn’t either or just flat out rejects the request if the password is too long.