CVE-2026-107349 PgBouncer - Denial of Service

PgBouncer 1.20.0 through 1.26.0 contains a denial of service caused by an infinite loop triggered by a StartupMessage with an empty parameter name in options, letting unauthenticated remote attackers saturate CPU and make the service unresponsive, exploit requires sending crafted StartupMessage.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
14 October 2026
Updated
15 October 2026
Weakness
CWE-400

Vendor fix

Update to a version later than 1.26.0 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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