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CVE-2026-107349

Infinite loop on empty option name in startup options parameter in PgBouncer

HIGH
7.5
CVSS Score
Published: October 14, 2026 at 05:34 PM UTC
Updated: October 16, 2026 at 09:17 PM UTC
1 product affected across 1 vendorPgbouncer

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Severity
HIGH7.5
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://www.pgbouncer.org/changelog.html

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHPostgreSQL
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-835CWE-400

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