PostgreSQL 18.6 was released on August 13, 2026, alongside 17.11, 16.15, 15.19, 14.24 and the third beta of PostgreSQL 19.
The release carries 28 security fixes and more than 110 bug fixes, because 18.5 was withdrawn after a regression was found post-wrap.
Three fixes are reachable from ordinary application input, including an overflow in `ltree` and SQL injection in `contrib/spi` and `pg_createsubscriber`.