BIT-PGBOUNCER-2026-6669 Unbounded SCRAM iteration count causes CPU exhaustion in PgBouncer

Missing upper bound on the key derivation iteration count accepted during SCRAM authentication to a backend server in PgBouncer through 1.25.2 allows a malicious or compromised PostgreSQL backend to cause uncontrolled CPU consumption in PgBouncer. The resulting key derivation cannot be interrupte...

bouncer-overflow

PgBouncer Crash PoC This repository contains a local proof of concept for a PgBouncer crash caused by an integer overflow in vulnerable PgBouncer versions. The included Docker setup builds PgBouncer 1.25.1, starts a PostgreSQL backend, enables SCRAM-SHA-256 authentication, and runs poc.py against...

Linux Distros Unpatched Vulnerability : CVE-2026-19888

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to...

The vulnerability of the SCRAM (Salted Challenge Response Authentication Mechanism) mechanism in the PostgreSQL PgBouncer connection pool allows a attacker to induce a service failure.

The vulnerability of the SCRAM Salted Challenge Response Authentication Mechanism mechanism in the PostgreSQL PgBouncer connection pool lies in the dereferencing of pointers due to the lack of validation for a required attribute in the end-message parser. Exploiting this vulnerability allows a...

The vulnerability of PostgreSQL PgBouncer’s connection pool software lies in the execution of an infinite loop when a condition for exiting the loop is not met. This allows a hacker to cause a service failure.

The vulnerability of the PostgreSQL PgBouncer connection pool software lies in the execution of a loop with an unreachable exit condition „Infinite loop“ due to a numerical overflow. Exploiting this vulnerability can allow a malicious actor to cause service failures remotely...

The vulnerability of the SCRAM (Salted Challenge Response Authentication Mechanism) mechanism in the PostgreSQL PgBouncer connection pool allows a attacker to induce a service failure.

The vulnerability of the SCRAM Salted Challenge Response Authentication Mechanism mechanism in the PostgreSQL PgBouncer connection pool software is related to uncontrolled resource consumption due to the lack of a limit on the number of iterations required to generate a password. Exploiting this...

Linux Distros Unpatched Vulnerability : CVE-2026-6668

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Integer overflow in the packet buffer growth logic in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to cause a denial of service...

Linux Distros Unpatched Vulnerability : CVE-2026-6669

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Missing upper bound on the key derivation iteration count accepted during SCRAM authentication to a backend server in PgBouncer through 1.25.2 allows a maliciou...

CVE-2026-6669

A flaw was found in PgBouncer. A malicious or compromised PostgreSQL backend can exploit a missing upper bound on the key derivation iteration count during SCRAM Salted Challenge Response Authentication Mechanism authentication. This can lead to uncontrolled CPU consumption in PgBouncer,...

CVE-2026-19888

A flaw was found in PgBouncer. Missing validation of a mandatory attribute in the SCRAM client-final-message parser allows an unauthenticated remote attacker to crash the process. By sending a malformed message, the parser can report success while a required value remains unset, leading to a NULL...

CVE-2026-6668

A flaw was found in PgBouncer. An unauthenticated remote attacker can exploit an integer overflow in the packet buffer growth logic by providing sufficiently large input. This causes the buffer size computation to overflow, leading to an infinite loop. As a result, a CPU core is saturated, and al...

DEBIAN-CVE-2026-6669

Missing upper bound on the key derivation iteration count accepted during SCRAM authentication to a backend server in PgBouncer through 1.25.2 allows a malicious or compromised PostgreSQL backend to cause uncontrolled CPU consumption in PgBouncer. The resulting key derivation cannot be interrupte...

AZL-103433 CVE-2026-6668 affecting package pgbouncer 1.25.2-1

Integer overflow in the packet buffer growth logic in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to cause a denial of service. Sufficiently large input makes the buffer size computation overflow, leaving the growth loop unable to terminate. Because PgBouncer serves all...

CVE-2026-6669

Missing upper bound on the key derivation iteration count accepted during SCRAM authentication to a backend server in PgBouncer through 1.25.2 allows a malicious or compromised PostgreSQL backend to cause uncontrolled CPU consumption in PgBouncer. The resulting key derivation cannot be interrupte...

AZL-105063 CVE-2026-6669 affecting package pgbouncer 1.25.2-1

Missing upper bound on the key derivation iteration count accepted during SCRAM authentication to a backend server in PgBouncer through 1.25.2 allows a malicious or compromised PostgreSQL backend to cause uncontrolled CPU consumption in PgBouncer. The resulting key derivation cannot be interrupte...

DEBIAN-CVE-2026-6668

Integer overflow in the packet buffer growth logic in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to cause a denial of service. Sufficiently large input makes the buffer size computation overflow, leaving the growth loop unable to terminate. Because PgBouncer serves all...

CVE-2026-6668

Integer overflow in the packet buffer growth logic in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to cause a denial of service. Sufficiently large input makes the buffer size computation overflow, leaving the growth loop unable to terminate. Because PgBouncer serves all...

DEBIAN-CVE-2026-19888

Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced ...

AZL-103430 CVE-2026-19888 affecting package pgbouncer 1.25.2-1

Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced ...

CVE-2026-19888

Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced ...