CVE-2026-107349

Name	CVE-2026-107349
Description	An infinite loop in PgBouncer 1.20.0 through 1.26.0 allows an unauthenticated remote attacker to cause a denial of service. A StartupMessage whose options parameter contains an empty parameter name, such as "-c=", makes the ignore_startup_parameters list lookup loop forever. Because PgBouncer serves all clients from a single process, this saturates a CPU core and makes PgBouncer unresponsive to all clients until the process is restarted.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
pgbouncer (PTS)	bookworm	1.18.0-1+deb12u1	vulnerable
	trixie	1.24.1-1+deb13u2	vulnerable
	forky, sid	1.26.1-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
pgbouncer	source	(unstable)	1.26.1-1

Fixed by: https://github.com/pgbouncer/pgbouncer/commit/5cf3aa700d4a871e79540c545d8fe8990cb39b08 (pgbouncer_1_26_1)