EUVD-2026-49937
GHSA-h7hw-g87c-29wh
Severity by source
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
Primary rating from Vendor (EDB) · only source for this CVE.
CVSS VectorVendor: EDB
Lifecycle Timeline
3DescriptionCVE.org
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.
Articles & Coverage 2
AnalysisAI
Privilege escalation in pglogical allows a publisher to execute functions as superuser on the subscriber by exploiting default expression evaluation during replication of rows with missing columns. This affects deployments where non-superuser roles are permitted to create subscriptions, such as managed PostgreSQL services. No public exploit is known, and the path is distinct from CVE-2026-50736.
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External POC / Exploit Code
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