{"id":"DEBIAN-CVE-2026-50737","details":"When applying replicated changes for a row that is missing one or more columns, pglogical evaluates the affected table's default expressions on the subscriber. Because the apply worker runs at a privilege level equivalent to a PostgreSQL superuser in default installations, any function invoked by such a default expression also runs at that privilege. A party acting as the publisher can use this path to cause functions to be executed on the subscriber as superuser, escalating from a role permitted to use pglogical to full superuser.  This is a second, independent path to the same superuser escalation tracked under CVE-2026-50736 (the pglogical queue issue). To exploit the issue an attacker must be able to direct a subscription at an endpoint they control. In default installations this requires privileges normally reserved for a superuser, so the issue is most relevant to managed deployments where the ability to create subscriptions has been delegated to non-superuser roles.","modified":"2026-07-29T09:00:14.610132733Z","published":"2026-07-28T19:17:36.827Z","upstream":["CVE-2026-50737"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-50737"}],"affected":[{"package":{"name":"pglogical","ecosystem":"Debian:11","purl":"pkg:deb/debian/pglogical?arch=source&distro=bullseye"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.3-3","2.3.3-3+deb11u1","2.3.3-4","2.4.0-1","2.4.0-2","2.4.1-1","2.4.2-1","2.4.2-2","2.4.2-3","2.4.3-1","2.4.3-2","2.4.4-1","2.4.4-2","2.4.4-3","2.4.5-1","2.4.6-1","2.4.6-2","2.4.7-1","2.4.8-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-50737.json"}},{"package":{"name":"pglogical","ecosystem":"Debian:12","purl":"pkg:deb/debian/pglogical?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.2-3","2.4.3-1","2.4.3-2","2.4.4-1","2.4.4-2","2.4.4-3","2.4.5-1","2.4.6-1","2.4.6-2","2.4.7-1","2.4.8-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-50737.json"}},{"package":{"name":"pglogical","ecosystem":"Debian:13","purl":"pkg:deb/debian/pglogical?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.5-1","2.4.6-1","2.4.6-2","2.4.7-1","2.4.8-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-50737.json"}},{"package":{"name":"pglogical","ecosystem":"Debian:14","purl":"pkg:deb/debian/pglogical?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.5-1","2.4.6-1","2.4.6-2","2.4.7-1","2.4.8-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-50737.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}