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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>31.9. Security</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="prev" href="logical-replication-monitoring.html" title="31.8. Monitoring" /><link rel="next" href="logical-replication-config.html" title="31.10. Configuration Settings" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">31.9. Security</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="logical-replication-monitoring.html" title="31.8. Monitoring">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="logical-replication.html" title="Chapter 31. Logical Replication">Up</a></td><th width="60%" align="center">Chapter 31. Logical Replication</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 15.5 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="logical-replication-config.html" title="31.10. Configuration Settings">Next</a></td></tr></table><hr /></div><div class="sect1" id="LOGICAL-REPLICATION-SECURITY"><div class="titlepage"><div><div><h2 class="title" style="clear: both">31.9. Security</h2></div></div></div><p>
A user able to modify the schema of subscriber-side tables can execute
arbitrary code as the role which owns any subscription which modifies those tables. Limit ownership
and <code class="literal">TRIGGER</code> privilege on such tables to trusted roles.
Moreover, if untrusted users can create tables, use only
publications that list tables explicitly. That is to say, create a
subscription <code class="literal">FOR ALL TABLES</code> or
<code class="literal">FOR TABLES IN SCHEMA</code> only when superusers trust
every user permitted to create a non-temp table on the publisher or the
subscriber.
</p><p>
The role used for the replication connection must have
the <code class="literal">REPLICATION</code> attribute (or be a superuser). If the
role lacks <code class="literal">SUPERUSER</code> and <code class="literal">BYPASSRLS</code>,
publisher row security policies can execute. If the role does not trust
all table owners, include <code class="literal">options=-crow_security=off</code> in
the connection string; if a table owner then adds a row security policy,
that setting will cause replication to halt rather than execute the policy.
Access for the role must be configured in <code class="filename">pg_hba.conf</code>
and it must have the <code class="literal">LOGIN</code> attribute.
</p><p>
In order to be able to copy the initial table data, the role used for the
replication connection must have the <code class="literal">SELECT</code> privilege on
a published table (or be a superuser).
</p><p>
To create a publication, the user must have the <code class="literal">CREATE</code>
privilege in the database.
</p><p>
To add tables to a publication, the user must have ownership rights on the
table. To add all tables in schema to a publication, the user must be a
superuser. To create a publication that publishes all tables or all tables in
schema automatically, the user must be a superuser.
</p><p>
To create a subscription, the user must be a superuser.
</p><p>
The subscription apply process will run in the local database with the
privileges of the subscription owner.
</p><p>
On the publisher, privileges are only checked once at the start of a
replication connection and are not re-checked as each change record is read.
</p><p>
On the subscriber, the subscription owner's privileges are re-checked for
each transaction when applied. If a worker is in the process of applying a
transaction when the ownership of the subscription is changed by a
concurrent transaction, the application of the current transaction will
continue under the old owner's privileges.
</p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="logical-replication-monitoring.html" title="31.8. Monitoring">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="logical-replication.html" title="Chapter 31. Logical Replication">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="logical-replication-config.html" title="31.10. Configuration Settings">Next</a></td></tr><tr><td width="40%" align="left" valign="top">31.8. Monitoring </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 15.5 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 31.10. Configuration Settings</td></tr></table></div></body></html>
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