UBUNTU-CVE-2026-6669

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Source

https://ubuntu.com/security/CVE-2026-6669

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-6669.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-6669

Upstream

CVE-2026-6669

Published

2026-09-24T00:00:00Z

Modified

2026-09-25T06:36:37Z

Severity

5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

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 interrupted in frontend builds such as PgBouncer. Because PgBouncer serves all clients from a single process, one backend can in this way stop it from serving traffic for every other database and client it is pooling, so the failure of a single backend is not contained.

References

Affected packages

Ubuntu:16.04:LTS

pgbouncer

Package

Name: pgbouncer
Purl: pkg:deb/ubuntu/pgbouncer?arch=source&distro=xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.5.5-1

1.6.1-1

1.7-1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "pgbouncer",
            "binary_version":  "1.7-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-6669.json"

Ubuntu:18.04:LTS

pgbouncer

Package

Name: pgbouncer
Purl: pkg:deb/ubuntu/pgbouncer?arch=source&distro=bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.7.2-3build1

1.7.2-65-g2b8e6cf-1

1.8.1-1

1.8.1-1build1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "pgbouncer",
            "binary_version":  "1.8.1-1build1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-6669.json"

Ubuntu:20.04:LTS

pgbouncer

Package

Name: pgbouncer
Purl: pkg:deb/ubuntu/pgbouncer?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.10.0-1

1.10.0-1build1

1.11.0-1

1.12.0-2

1.12.0-3

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "pgbouncer",
            "binary_version":  "1.12.0-3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-6669.json"

Ubuntu:22.04:LTS

pgbouncer

Package

Name: pgbouncer
Purl: pkg:deb/ubuntu/pgbouncer?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.15.0-1

1.16.1-1ubuntu1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "pgbouncer",
            "binary_version":  "1.16.1-1ubuntu1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-6669.json"

Ubuntu:24.04:LTS

pgbouncer

Package

Name: pgbouncer
Purl: pkg:deb/ubuntu/pgbouncer?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.20.0-1

1.21.0-1

1.22.0-1

1.22.0-1build1

1.22.0-1build3

1.22.0-1build4

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "pgbouncer",
            "binary_version":  "1.22.0-1build4"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-6669.json"

Ubuntu:26.04:LTS

pgbouncer

Package

Name: pgbouncer
Purl: pkg:deb/ubuntu/pgbouncer?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.24.1-1

1.25.0-2

1.25.1-1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "pgbouncer",
            "binary_version":  "1.25.1-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-6669.json"