PostgreSQL 13.4, 12.8, 11.13, 10.18, 9.6.23, and 14 Beta 3 Released!

Posted on 2021-08-12 by PostgreSQL Global Development Group
PostgreSQL Project Security

The PostgreSQL Global Development Group has released an update to all supported versions of our database system, including 13.4, 12.8, 11.13, 10.18, and 9.6.23, as well as the third beta release of PostgreSQL 14. This release closes one security vulnerability and fixes over 75 bugs reported over the last three months.

For the full list of changes, please review the release notes.

PostgreSQL 9.6 EOL Approaching

PostgreSQL 9.6 will stop receiving fixes on November 11, 2021. If you are running PostgreSQL 9.6 in a production environment, we suggest that you make plans to upgrade to a newer, supported version of PostgreSQL. Please see our versioning policy for more information.

Security Issues

CVE-2021-3677: Memory disclosure in certain queries

Versions Affected: 11 - 13.

A purpose-crafted query can read arbitrary bytes of server memory. In the default configuration, any authenticated database user can complete this attack at will. The attack does not require the ability to create objects. If server settings include max_worker_processes=0, the known versions of this attack are infeasible. However, undiscovered variants of the attack may be independent of that setting.

A Note on the PostgreSQL 14 Beta

This release marks the third beta release of PostgreSQL 14 and puts the community one step closer to general availability tentatively around the end of the third quarter.

In the spirit of the open source PostgreSQL community, we strongly encourage you to test the new features of PostgreSQL 14 in your database systems to help us eliminate any bugs or other issues that may exist. While we do not advise you to run PostgreSQL 14 Beta 3 in your production environments, we encourage you to find ways to run your typical application workloads against this beta release.

Your testing and feedback will help the community ensure that the PostgreSQL 14 release upholds our standards of providing a stable, reliable release of the world's most advanced open source relational database.

Bug Fixes and Improvements

This update also fixes over 75 bugs that were reported in the last several months. Some of these issues affect only version 13, but many affect all supported versions.

Some of these fixes include:

  • Completely disable TLS/SSL renegotiation. This was previously disabled, but the server would still execute a client-initiated renegotiation request.
  • Restore the Portal-level snapshot after COMMIT or ROLLBACK within a procedure. This change fixes cases where an attempt to fetch a toasted value immediately after COMMIT/ROLLBACK would fail with errors like "no known snapshots" or "missing chunk number 0 for toast value".
  • Avoid misbehavior when persisting the output of a cursor that's reading a volatile query.
  • Reject cases where a query in WITH rewrites to just NOTIFY, which would cause a crash.
  • Several corner-case fixes for numeric types.
  • ALTER EXTENSION now locks the extension when adding or removing a member object.
  • The "enabled" status is now copied when a partitioned table's triggers are cloned to a new partition.
  • Avoid alias conflicts in queries generated for REFRESH MATERIALIZED VIEW CONCURRENTLY. This command failed on materialized views containing columns with certain names, notably mv and newdata.
  • Disallow whole-row variables in GENERATED expressions.
  • Several fixes for DROP OWNED BY behavior in relation to row-level security (RLS) policies.
  • Re-allow old-style Windows locale names in CREATE COLLATION commands.
  • walsenders now show their latest replication command in pg_stat_activity, instead of just showing the latest SQL command.
  • pg_settings.pending_restart now shows as true when a pertinent entry in postgresql.conf is removed.
  • On 64-bit Windows, allow the effective value of work_mem * hash_mem_multiplier to exceed 2GB.
  • Update minimum recovery point when WAL replay of a transaction abort record causes file truncation.
  • Advance oldest-required-WAL-segment horizon properly after a replication slot is invalidated. This fixes an issue where the server's WAL storage could run out of space.
  • Improve progress reporting for the sort phase of a parallel B-tree index build.
  • Fix assorted crash cases in logical replication of partitioned-table updates and when firing AFTER triggers of partitioned tables.
  • Prevent infinite loops in SP-GiST index insertion.
  • Ensure that SP-GiST index insertion can be terminated by a query cancel request.
  • In psql and other client programs, avoid overrunning the ends of strings when dealing with invalidly-encoded data.
  • Fix pg_dump to correctly handle triggers on partitioned tables whose enabled status is different from their parent triggers' status.
  • Avoid "invalid creation date in header" warnings when running pg_restore on a file created in a different time zone.
  • pg_upgrade now carries forward the old installation's oldestXID value and no longer forces an anti-wraparound VACUUM."
  • Extend pg_upgrade to detect and warn about extensions that should be upgraded.
  • Fix contrib/postgres_fdw to better work with generated columns, so long as a generated column in a foreign table represents a generated column in the remote table.

For the full list of changes available, please review the release notes.


All PostgreSQL update releases are cumulative. As with other minor releases, users are not required to dump and reload their database or use pg_upgrade in order to apply this update release; you may simply shut down PostgreSQL and update its binaries.

Users who have skipped one or more update releases may need to run additional, post-update steps; please see the release notes for earlier versions for details.

For more details, please see the release notes.

NOTE: PostgreSQL 9.6 will stop receiving fixes on November 11, 2021. Please see our versioning policy for more information.

PostgreSQL 14 Beta 3 Notes

PostgreSQL 14 Beta 3 introduces the unnest function for multirange types as well as several bug fixes.

For a list of changes that are included in PostgreSQL 14 Beta 3, please review the open items page:

To upgrade to PostgreSQL 14 Beta 3 from Beta 2, Beta 1, or an earlier version of PostgreSQL, you will need to use a strategy similar to upgrading between major versions of PostgreSQL (e.g. pg_upgrade or pg_dump / pg_restore). For more information, please visit the documentation section on upgrading.

Testing for Bugs & Compatibility

The stability of each PostgreSQL release greatly depends on you, the community, to test the upcoming version with your workloads and testing tools in order to find bugs and regressions before the general availability of PostgreSQL 14. As this is a Beta, minor changes to database behaviors, feature details, and APIs are still possible. Your feedback and testing will help determine the final tweaks on the new features, so please test in the near future. The quality of user testing helps determine when we can make a final release.

A list of open issues is publicly available in the PostgreSQL wiki. You can report bugs using this form on the PostgreSQL website:

Beta Schedule

This is the third beta release of version 14. The PostgreSQL Project will release additional betas as required for testing, followed by one or more release candidates, until the final release in late 2021. For further information please see the Beta Testing page.