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.
Metrics
Affected Vendors & Products
References
History
Tue, 28 Jul 2026 21:00:00 +0000
| Type | Values Removed | Values Added |
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Enterprisedb
Enterprisedb pglogical |
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| Vendors & Products |
Enterprisedb
Enterprisedb pglogical |
Tue, 28 Jul 2026 18:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Weaknesses | CWE-250 | |
| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: EDB
Published:
Updated: 2026-07-28T18:52:19.292Z
Reserved: 2026-06-05T19:13:51.103Z
Link: CVE-2026-50737
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OpenCVE Enrichment
Updated: 2026-07-28T20:33:53Z