pglogical — security advisory
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.
- Products
- pglogical
- Affected versions
- 2.0.0-1, 2.1.0-1, 2.1.1-1, 2.2.2-1, 2.3.0-1, 2.3.3-3, 2.4.0-2, 2.4.1-1, 2.4.3-1ubuntu1, 2.4.4-1, 2.4.5-1build1, 2.4.6-1, 2.4.6-2, 2.4.7-1, 2.4.8-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-50737
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:28 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2026-50737
pglogical
Fixed versions: Not specified
pglogical
Fixed versions: Not specified
pglogical
Fixed versions: Not specified
pglogical
Fixed versions: Not specified
pglogical
Fixed versions: Not specified
pglogical
Fixed versions: Not specified
Complete source record
{
"id": "0e33cd1a9833b7865172dcc30e2a00e2a96b2a06babbf7484ae3020079b18204",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-50737",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-50737",
"summary": "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.",
"evidence": "osv:UBUNTU-CVE-2026-50737",
"products": [
{
"name": {
"value": "pglogical",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0.0-1",
"evidence": "/affected/0/versions"
},
{
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"evidence": "/affected/0/versions"
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{
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},
{
"name": {
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"affected_versions": [
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"evidence": "/affected/1/versions"
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{
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"evidence": "/affected/1/versions"
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},
{
"name": {
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"affected_versions": [
{
"value": "2.3.3-3",
"evidence": "/affected/2/versions"
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{
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"evidence": "/affected/2/versions"
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{
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{
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"evidence": "/affected/3/versions"
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{
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"evidence": "/affected/3/versions"
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},
{
"name": {
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"affected_versions": [
{
"value": "2.4.6-2",
"evidence": "/affected/4/versions"
},
{
"value": "2.4.7-1",
"evidence": "/affected/4/versions"
},
{
"value": "2.4.8-1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "pglogical",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.4.5-1build1",
"evidence": "/affected/5/versions"
},
{
"value": "2.4.6-1",
"evidence": "/affected/5/versions"
},
{
"value": "2.4.6-2",
"evidence": "/affected/5/versions"
}
]
}
],
"severity": "critical",
"structured": {
"id": "UBUNTU-CVE-2026-50737",
"aliases": [
"UBUNTU-CVE-2026-50737"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "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"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "pglogical",
"purl": "pkg:deb/ubuntu/pglogical?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"2.0.0-1",
"2.1.0-1",
"2.1.1-1"
],
"database_specific": {
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},
"ecosystem_specific": {
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{
"binary_name": "postgresql-10-pglogical",
"binary_version": "2.1.1-1"
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}
},
{
"ranges": [
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"package": {
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"purl": "pkg:deb/ubuntu/pglogical?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"2.2.2-1",
"2.3.0-1"
],
"database_specific": {
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},
"ecosystem_specific": {
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}
]
}
},
{
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],
"package": {
"name": "pglogical",
"purl": "pkg:deb/ubuntu/pglogical?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"2.3.3-3",
"2.4.0-2",
"2.4.1-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50737.json"
},
"ecosystem_specific": {
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{
"binary_name": "postgresql-14-pglogical",
"binary_version": "2.4.1-1"
}
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},
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"ecosystem": "Ubuntu:24.04:LTS"
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"versions": [
"2.4.3-1ubuntu1",
"2.4.4-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50737.json"
},
"ecosystem_specific": {
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"binary_name": "postgresql-16-pglogical",
"binary_version": "2.4.4-1"
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{
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"ecosystem": "Ubuntu:26.10"
},
"versions": [
"2.4.6-2",
"2.4.7-1",
"2.4.8-1"
],
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},
"ecosystem_specific": {
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"binary_name": "postgresql-18-pglogical",
"binary_version": "2.4.8-1"
}
]
}
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{
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"package": {
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"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"2.4.5-1build1",
"2.4.6-1",
"2.4.6-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-50737.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "postgresql-18-pglogical",
"binary_version": "2.4.6-2"
}
]
}
}
],
"modified": "2026-10-17T12:58:33.952064044Z",
"provider": "osv",
"upstream": [
"CVE-2026-50737"
],
"references": [
"https://ubuntu.com/security/CVE-2026-50737",
"https://www.cve.org/CVERecord?id=CVE-2026-50737",
"https://github.com/2ndQuadrant/pglogical/releases/tag/REL2_4_8",
"https://www.enterprisedb.com/docs/security/advisories/cve202650735/"
]
},
"related_cves": [
{
"value": "CVE-2026-50737",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 358784,
"published_at": "2026-07-28T19:17:00+00:00"
}