Vulnerability Details CVE-2026-50736
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 9.1%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2026-50736
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cpe:2.3:a:enterprisedb:pglogical:2.0.0
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cpe:2.3:a:enterprisedb:pglogical:2.0.1
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cpe:2.3:a:enterprisedb:pglogical:2.1.0
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cpe:2.3:a:enterprisedb:pglogical:2.1.1
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cpe:2.3:a:enterprisedb:pglogical:2.2.0
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cpe:2.3:a:enterprisedb:pglogical:2.2.1
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cpe:2.3:a:enterprisedb:pglogical:2.2.2
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cpe:2.3:a:enterprisedb:pglogical:2.3.0
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cpe:2.3:a:enterprisedb:pglogical:2.3.1
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cpe:2.3:a:enterprisedb:pglogical:2.3.2
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cpe:2.3:a:enterprisedb:pglogical:2.3.3
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cpe:2.3:a:enterprisedb:pglogical:2.3.4
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cpe:2.3:a:enterprisedb:pglogical:2.4.0
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cpe:2.3:a:enterprisedb:pglogical:2.4.1
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cpe:2.3:a:enterprisedb:pglogical:2.4.2
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cpe:2.3:a:enterprisedb:pglogical:2.4.3
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cpe:2.3:a:enterprisedb:pglogical:2.4.4
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cpe:2.3:a:enterprisedb:pglogical:2.4.5
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cpe:2.3:a:enterprisedb:pglogical:2.4.6
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cpe:2.3:a:enterprisedb:pglogical:2.4.7