CVE-2026-107349CWE-400CWE-835denial-of-service

CVE-2026-107349

High · published October 14, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
35.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00422 · 35.4th percentile
Weaknesses
CWE-400 · Uncontrolled Resource Consumption; CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')
Published
2026-10-14T22:17Z
References (1)
https://www.pgbouncer.org/changelog.html · f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
EPSS history
Timeline
  • 16 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 14 OCT 17:34Z
    Infinite loop on empty option name in startup options parameter in PgBouncer
    cvelistv5
  • 14 OCT 17:34Z
    Infinite loop on empty option name in startup options parameter in PgBouncer
    cvelistv5