CVE-2026-6664

PgBouncer integer overflow in PgBouncer network packet parsing

State: Published
Severity: 7.5 High
Published: May 9, 2026
Updated: May 11, 2026
Reserved: Apr 20, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	PostgreSQL

Weaknesses

CWE-190 Integer Overflow or Wraparound

Affected Products

Product	Versions
PgBouncern/a	before 1.25.2Affected

References

https://www.pgbouncer.org/changelog.html#pgbouncer-125x

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