EUVD-2026-49937
GHSA-h7hw-g87c-29wh
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V8 - Authorization Unnecessary privilege execution
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Alert meAnalysisAIv1 – Jul 28, 2026
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.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
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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
Primary rating from Vendor (EDB) · only source for this CVE.
CVSS VectorVendor: EDB
Lifecycle Timeline
2DescriptionCVE.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
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
VulDB
How this decision was reached
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What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Privilege escalation occurs when an attacker leverages flaws in access control mechanisms to gain permissions beyond what they were originally granted.
SQL injection in pglogical's queue mechanism allows a publisher to execute arbitrary SQL as superuser on the subscriber,
Remote code execution in pglogical extension for PostgreSQL allows a low-privileged user to crash replication workers, w
A shell injection flaw was found in pglogical in versions before 2.3.4 and before 3.6.26. Rated medium severity (CVSS 6.
Out-of-bounds read in pglogical's apply worker allows a malicious publisher to disclose adjacent process memory or crash
Exploit-DB