UBUNTU-CVE-2026-61781 (CVE-2026-61781)
Vulnerability from osv_ubuntu – Published: 2026-09-21 00:00 – Updated: 2026-09-21 00:00 – Source website
VLAI
Details
pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, create_partition_time() reads the writable part_config.time_encoder text value and interpolates it without identifier quoting into a dynamically executed SELECT statement. A role with the documented partman_user INSERT and UPDATE privileges can store SQL rather than a function name. When pg_partman_bgw later creates a child partition for a text- or UUID-keyed set, the worker executes the stored SQL with pg_partman_bgw.role privileges, which default to PostgreSQL superuser. The persistent configuration row can repeatedly restore elevated access on later maintenance ticks, and successful exploitation can permit database-wide compromise and operating-system command execution as the PostgreSQL service account. This issue is fixed in version 5.5.0.
Severity
9.9 (Critical)
N/A (UNKNOWN)
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "postgresql-9.5-partman",
"binary_version": "2.2.2-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "pg-partman",
"purl": "pkg:deb/ubuntu/pg-partman@2.2.2-2?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.2.2-1",
"2.2.2-2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "postgresql-10-partman",
"binary_version": "3.1.2-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "pg-partman",
"purl": "pkg:deb/ubuntu/pg-partman@3.1.2-1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.6.3-1",
"3.1.0-1",
"3.1.1-1",
"3.1.2-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "postgresql-12-partman",
"binary_version": "4.3.0-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "pg-partman",
"purl": "pkg:deb/ubuntu/pg-partman@4.3.0-1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.0.0-1",
"4.2.0-1",
"4.2.2-1",
"4.3.0-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "postgresql-14-partman",
"binary_version": "4.6.0-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "pg-partman",
"purl": "pkg:deb/ubuntu/pg-partman@4.6.0-1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.5.1-1",
"4.6.0-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "postgresql-16-partman",
"binary_version": "5.0.1-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "pg-partman",
"purl": "pkg:deb/ubuntu/pg-partman@5.0.1-1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.7.3-1",
"5.0.0-2",
"5.0.1-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "postgresql-18-partman",
"binary_version": "5.4.1-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "pg-partman",
"purl": "pkg:deb/ubuntu/pg-partman@5.4.1-1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.2.4-1",
"5.3.1-2",
"5.4.0-1",
"5.4.1-1"
]
}
],
"aliases": [],
"details": "pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, create_partition_time() reads the writable part_config.time_encoder text value and interpolates it without identifier quoting into a dynamically executed SELECT statement. A role with the documented partman_user INSERT and UPDATE privileges can store SQL rather than a function name. When pg_partman_bgw later creates a child partition for a text- or UUID-keyed set, the worker executes the stored SQL with pg_partman_bgw.role privileges, which default to PostgreSQL superuser. The persistent configuration row can repeatedly restore elevated access on later maintenance ticks, and successful exploitation can permit database-wide compromise and operating-system command execution as the PostgreSQL service account. This issue is fixed in version 5.5.0.",
"id": "UBUNTU-CVE-2026-61781",
"modified": "2026-09-21T00:00:00Z",
"published": "2026-09-21T00:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-61781"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-61781"
},
{
"type": "REPORT",
"url": "https://github.com/pgpartman/pg_partman/security/advisories/GHSA-742w-3j7c-qwvp"
},
{
"type": "REPORT",
"url": "https://github.com/pgpartman/pg_partman/commit/ba9405542acf24dd881845b935cab8b165854361"
},
{
"type": "REPORT",
"url": "https://github.com/pgpartman/pg_partman/releases/tag/v5.5.0"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-61781"
]
}
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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