---
id: CVE-2026-61820
title: >-
  pg_partman is a PostgreSQL extension that manages partitioned tables by time
  or ID
summary: >-
  pg_partman is a PostgreSQL extension that manages partitioned tables by time
  or ID. Prior to 5.5.0, inherit_template_properties() manually surrounds
  primary-key column names from pg_attribute.attname with double quotes without
  escaping e…
severity: high
cvss: 8.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-89
vendor: pgpartman
product: pg_partman
affected:
  - pg_partman < 5.5.0
published: '2026-09-18'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T18:28:25.093'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-61820'
references:
  - url: >-
      https://github.com/pgpartman/pg_partman/commit/ba9405542acf24dd881845b935cab8b165854361
    label: security-advisories@github.com
  - url: 'https://github.com/pgpartman/pg_partman/releases/tag/v5.5.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/pgpartman/pg_partman/security/advisories/GHSA-xqxh-6hh3-974m
    label: security-advisories@github.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-61820.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-61820'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-61820'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00729
epssPercentile: 0.52176
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-22T15:39:28.982624Z'
ingestedAt: '2026-09-18T20:51:25.677Z'
---

## Overview

pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, inherit_template_properties() manually surrounds primary-key column names from pg_attribute.attname with double quotes without escaping embedded double-quote characters. A partman_user who owns a template table can create a crafted column name that breaks out of the generated ALTER TABLE ADD PRIMARY KEY identifier when the background worker applies the key to a child partition. The generated SQL then executes with pg_partman_bgw.role privileges, which default to PostgreSQL superuser, permitting database-wide compromise and operating-system command execution as the PostgreSQL service account. The crafted catalog identifier persists until removed and can trigger again during later partition creation. This issue is fixed in version 5.5.0.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · updated 2026-09-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-61820.json)