CVE-2026-6476

Name	CVE-2026-6476
Description	SQL injection in PostgreSQL pg_createsubscriber allows an attacker with pg_create_subscription rights to execute arbitrary SQL as a superuser. The attack takes effect when pg_createsubscriber next runs. Within major versions 17 and 18, minor versions before PostgreSQL 18.4 and 17.10 are affected. Versions before PostgreSQL 17 are unaffected.
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)
References	DSA-6270-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
postgresql-17 (PTS)	trixie	17.9-0+deb13u1	vulnerable
	trixie (security)	17.10-0+deb13u1	fixed
postgresql-18 (PTS)	forky	18.3-1	vulnerable
	sid	18.4-1	fixed

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

Package	Type	Release	Fixed Version	Origin
postgresql-17	source	trixie	17.10-0+deb13u1	DSA-6270-1
postgresql-17	source	(unstable)	(unfixed)
postgresql-18	source	(unstable)	18.4-1

https://www.postgresql.org/about/news/postgresql-184-1710-1614-1518-and-1423-released-3297/