CVE-2026-50736
CriticalCVSS 9.0Exploitation Probability (EPSS)
Low risk9th percentile - higher than 9% of all known CVEs
Summary
The pglogical queue mechanism executes message payloads on the subscriber with PostgreSQL superuser privileges. A publisher can send crafted messages to execute arbitrary SQL as superuser, escalating privileges and breaking tenant isolation.
Risk Assessment
An attacker with subscription creation privileges can gain full superuser control over the PostgreSQL instance, compromising data confidentiality and integrity, and potentially taking over the entire system.
Recommendation
Restrict pglogical subscription creation privileges to trusted roles only and consider using separate PostgreSQL instances for different tenants to enforce isolation.
Original NVD description (English source)
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.