First Published: 2026/07/28
Last Updated: 2026/07/28
Summary
The pglogical queue mechanism, used to convey out-of-band commands such as replicated DDL from a publisher to a subscriber, executes message payloads on the subscriber at the privilege level of the apply worker, which is equivalent to a PostgreSQL superuser in default installations. A party acting as the publisher can send crafted queue messages that cause arbitrary SQL to be executed on the subscriber as superuser, escalating from a role permitted to use pglogical to full superuser and breaking the isolation between tenants in shared deployments.
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.
Vulnerability details
CVE-ID: CVE-2026-50736
CVSS Base Score: 9.0
CVSS Temporal Score: Undefined
CVSS Environmental Score: Undefined
CVSS Vector: 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
Affected products and versions
- Affected Product: pglogical
- Affected Versions: All versions of pglogical 2.x prior to 2.4.8
Remediation/fixes
Impacted users must upgrade to a fixed version of pglogical. A fix will be made available in the next release of pglogical 2.
| Product | VRMF | Remediation/First Fix |
|---|---|---|
| pglogical | All 2.x versions prior to 2.4.8 | Update to latest supported version (at least 2.4.8) |
References
- CVSS Calculator v4.0
- CWE-89 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Related information
Acknowledgement
Source: Reported to EDB by Mehmet Ince (@mdisec) through the EDB Vulnerability Disclosure Program.
Change history
- 2026/07/28: Original Copy Published
Disclaimer
This document is provided on an "as is" basis and does not imply any kind of guarantee or warranty, including the warranties of merchantability or fitness for a particular use. Your use of the information on the document is at your own risk. EDB reserves the right to change or update this document at any time. Customers are therefore recommended to always view the latest version of this document.