Bug 2553066

Summary:	CVE-2026-107349 pgbouncer: pgbouncer: Denial of Service via empty parameter name in startup options [epel-all]
Product:	[Fedora] Fedora EPEL	Reporter:	Vladimir Vasilev <vvasilev>
Component:	pgbouncer	Assignee:	Devrim Gündüz <devrim>
Status:	NEW ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	high	Docs Contact:
Priority:	high
Version:	epel10	CC:	devrim, negativo17, praiskup
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["452a4e5f-c5ac-467a-bad1-521f212e53f2"]}
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2552735

Description Vladimir Vasilev 2026-10-15 07:16:51 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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.