CVE-2026-6664CWE-190

PgBouncer integer overflow in PgBouncer network packet parsing

High · published May 9, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
53.7
In the wild
Unconfirmed
What it is

An integer overflow in network packet parsing code in PgBouncer before 1.25.2 bypasses a boundary check and can lead to a crash. An unauthenticated remote attacker can crash PgBouncer with a malformed SCRAM authentication packet.

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
0.00729 · 53.7th percentile
Weakness
CWE-190 · Integer Overflow or Wraparound
Published
2026-05-09T00:43Z
EPSS history
Timeline
  • 09 MAY 00:43Z
    PgBouncer integer overflow in PgBouncer network packet parsing
    cvelistv5