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CVE-2026-107349 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: PostgreSQLCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://www.pgbouncer.org/changelog.html	PostgreSQL

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-400	Uncontrolled Resource Consumption	PostgreSQL
CWE-835	Loop with Unreachable Exit Condition ('Infinite Loop')	PostgreSQL

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 16, 2026	CVE Modified	CISA-ADP
Oct 14, 2026	New CVE Received	PostgreSQL