August 13, 2026: PostgreSQL 18.6, 17.11, 16.15, 15.19, 14.24 and 19 Beta 3 Released!

PgBouncer 1.26.0 released - Fixes three CVEs

Posted on 2026-09-23 by PgBouncer
Related Open Source

PgBouncer 1.26.0 has been released. This release fixes three CVEs:

  1. CVE-2026-19888: DoS due to crash, triggerable by unauthenticated clients. Caused by a SCRAM client-final-message without a nonce.
  2. CVE-2026-6668: DoS due to infinite loop, triggerable by unauthenticated clients. Caused by an integer overflow in the packet buffer growth logic.
  3. CVE-2026-6669: DoS due to unbounded work during login, triggerable by a malicious PostgreSQL server. Caused by an unbounded SCRAM iteration count.

It also tracks search_path and default_transaction_read_only by default, adds the pool_idle_timeout setting, allows query_wait_timeout to be set per user and database, adds meson build support, and removes the deprecated online restart (-R) functionality.

See https://www.pgbouncer.org/2026/09/pgbouncer-1-26-0 for more information, the detailed changelog, and download links.

PgBouncer is a lightweight connection pooler for PostgreSQL.