The PostgreSQL Global Development Group has released an update to all
supported versions of our database system, including 9.6.4, 9.5.8,
9.4.13, 9.3.18, and 9.2.22. This release fixes three security issues.
It also patches over 50 other bugs reported over the last three months.
Users who are affected by the below security issues should update as
soon as possible. Users affected by CVE-2017-7547
(https://access.redhat.com/security/cve/CVE-2017-7547) will need to
perform additional steps after upgrading to resolve the issue. Other
users should plan to update at the next convenient downtime.

URL: https://www.postgresql.org/about/news/1772/
Security: CVE-2017-7546, CVE-2017-7547, CVE-2017-7548