UBUNTU-CVE-2026-50737

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Source
https://ubuntu.com/security/CVE-2026-50737
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50737.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-50737
Upstream
Published
2026-07-28T19:17:00Z
Modified
2026-08-26T12:15:03Z
Severity
  • 9.0 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H CVSS Calculator
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

When applying replicated changes for a row that is missing one or more columns, pglogical evaluates the affected table's default expressions on the subscriber. Because the apply worker runs at a privilege level equivalent to a PostgreSQL superuser in default installations, any function invoked by such a default expression also runs at that privilege. A party acting as the publisher can use this path to cause functions to be executed on the subscriber as superuser, escalating from a role permitted to use pglogical to full superuser. This is a second, independent path to the same superuser escalation tracked under CVE-2026-50736 (the pglogical queue issue). To exploit the issue an attacker must be able to direct a subscription at an endpoint they control. In default installations this requires privileges normally reserved for a superuser, so the issue is most relevant to managed deployments where the ability to create subscriptions has been delegated to non-superuser roles.

References

Affected packages

Ubuntu:18.04:LTS / pglogical

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.0.0-1
2.1.0-1
2.1.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "postgresql-10-pglogical",
            "binary_version": "2.1.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50737.json"

Ubuntu:20.04:LTS / pglogical

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.2.2-1
2.3.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "postgresql-12-pglogical",
            "binary_version": "2.3.0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50737.json"

Ubuntu:22.04:LTS / pglogical

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.3.3-3
2.4.0-2
2.4.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "postgresql-14-pglogical",
            "binary_version": "2.4.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50737.json"

Ubuntu:24.04:LTS / pglogical

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.4.3-1ubuntu1
2.4.4-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "postgresql-16-pglogical",
            "binary_version": "2.4.4-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50737.json"

Ubuntu:26.04:LTS / pglogical

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.4.5-1build1
2.4.6-1
2.4.6-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "postgresql-18-pglogical",
            "binary_version": "2.4.6-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50737.json"