On Wed, Jul 9, 2025 at 9:57 AM Alpaslan AKDAĞ <alpaslanak...@gmail.com>
wrote:

> Is it expected behavior that users created with scram-sha-256 passwords
> can still connect via md5 in pg_hba.conf?


Yes. From the docs:

> To ease transition from the md5 method to the newer SCRAM method, if md5 is
> specified as a method in pg_hba.conf but the user's password on the
> server is encrypted for SCRAM (see below), then SCRAM-based authentication
> will automatically be chosen instead.


You can think of "md5" inside pg_hba.conf as "md5 or better"

As a result, some users are able to connect, while others cannot.


Can you expand on this? Nothing you have done should be preventing logins,
as far as I can tell.

Best solution: Upgrade everyone to scram, then change md5 to scram in
pg_hba.conf and never look back.

-- 
Cheers,
Greg

--
Crunchy Data - https://www.crunchydata.com
Enterprise Postgres Software Products & Tech Support

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