CVE-2026-6668 PgBouncer - Denial of Service

PgBouncer through 1.25.2 contains an integer overflow caused by improper packet buffer growth logic, letting unauthenticated remote attackers cause denial of service by saturating CPU and stalling connections, exploit requires crafted large input.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.40% chance of exploitation in 30 days
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
23 September 2026
Updated
15 October 2026
Weakness
CWE-190

Vendor fix

Update to the latest version beyond 1.25.2.

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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