CVE-2026-61818

Name	CVE-2026-61818
Description	pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, undo_partition() reads part_config.time_encoder as unrestricted text and interpolates it without identifier quoting into a dynamically executed SELECT statement. A role with partman_user access can store SQL rather than a function name, and the SQL executes with the privileges of the caller that invokes undo_partition(). The function is not part of the default background-worker path, which limits the automatic superuser escalation described by the related create-partition vulnerability, but a privileged caller can still have its available confidentiality, integrity, and availability permissions abused. 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-fm3m-9fh7-mqfc
Fixed by: https://github.com/pgpartman/pg_partman/commit/ba9405542acf24dd881845b935cab8b165854361 (v5.5.0)