---
id: CVE-2026-61817
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, run_maintenance(), show_partitions(),
  show_partition_info(), undo_partition(), and partition_data_time() interpolate
  the writable part_co…
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: '2026-09-24'
sourceUpdated: '2026-09-24T21:22:19.873'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-61817'
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-gmw2-52wc-258g
    label: security-advisories@github.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-61817.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-61817'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-61817'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00729
epssPercentile: 0.52176
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-19T13:37:45.837285Z'
ingestedAt: '2026-09-18T20:51:25.676Z'
---

## Overview

pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, run_maintenance(), show_partitions(), show_partition_info(), undo_partition(), and partition_data_time() interpolate the writable part_config.time_dncoder text value without identifier quoting into dynamic SQL. A role with the documented partman_user privileges can store SQL rather than a decoder function name. When an affected operation later uses the poisoned value, including pg_partman_bgw maintenance for a text- or UUID-keyed set, the SQL executes with the operation's privileges, which can be the default PostgreSQL superuser background-worker role. The persistent row can restore elevated access on later 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.

## 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-2026-61817.json)