CVE-2026-61820

Name	CVE-2026-61820
Description	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
pg-partman (PTS)	bookworm	4.7.2-1	vulnerable
	trixie	5.2.4-1	vulnerable
	forky, sid	5.5.0-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
pg-partman	source	(unstable)	5.5.0-1

Notes

[trixie] - pg-partman <no-dsa> (Minor issue)
[bookworm] - pg-partman <postponed> (Minor issue)
https://github.com/pgpartman/pg_partman/security/advisories/GHSA-xqxh-6hh3-974m
Fixed by: https://github.com/pgpartman/pg_partman/commit/ba9405542acf24dd881845b935cab8b165854361 (v5.5.0)