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Vulnerability record · CVE-2026-50738 · published 28 July 2026

CVE-2026-50738: Enterprisedb pglogical use after free vulnerability

Enterprisedb · Pglogical

A use-after-free condition exists in pglogical's worker signaling code, where a worker structure can be dereferenced after the underlying slot has been freed or recycled during normal worker lifecycle events. The condition is reachable during normal replication operation, including by a low-privileged user able to influence worker start, stop, and restart timing through permitted pglogical operations. In the typical case the condition crashes replication workers, causing an availability impact. In the worst case a use-after-free in a PostgreSQL backend can be leveraged as a remote code execution primitive at the privilege of that backend.

7.7 CVSS 4.0 High EPSS 0.51% · top 59.0% CWE-416 · Use after free
7.7CVSS 4.0 base score
0.51%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
24 Aug 2026Last modified by NVD

Description

A use-after-free condition exists in pglogical's worker signaling code, where a worker structure can be dereferenced after the underlying slot has been freed or recycled during normal worker lifecycle events. The condition is reachable during normal replication operation, including by a low-privileged user able to influence worker start, stop, and restart timing through permitted pglogical operations. In the typical case the condition crashes replication workers, causing an availability impact. In the worst case a use-after-free in a PostgreSQL backend can be leveraged as a remote code execution primitive at the privilege of that backend.

CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.enterprisedb.com/docs/security/advisories/cve202650738/ Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.0CVE-2026-50736Enterprisedb pglogical sql injection vulnerabilityThe pglogical queue mechanism, used to convey out-of-band commands such as replicated DDL from a publisher to a subscriber, executes message payloads…EPSS 0.41%9.0CVE-2026-50737Enterprisedb pglogical execution with unnecessary privileges vulnerabilityWhen applying replicated changes for a row that is missing one or more columns, pglogical evaluates the affected table's default expressions on the s…EPSS 0.40%6.1CVE-2026-50735Enterprisedb pglogical out-of-bounds read vulnerabilitypglogical's apply worker does not sufficiently validate the length of certain fields in incoming replication protocol messages before copying them, r…EPSS 0.38%7.0CVE-2026-68820Windows Ancillary Function Driver for WinSock use-after-free privilege escalationThe Windows Ancillary Function Driver for WinSock (afd.sys) contains a use-after-free (CWE-416) that lets an authorized local attacker elevate privil…KEVEPSS 0.33%analysed8.8CVE-2010-0806Microsoft Internet Explorer Peer Objects use-after-free allows remote code executionInternet Explorer 6, 6 SP1 and 7 contain a use-after-free in the Peer Objects component (iepeers.dll), where an object is accessed after deletion, le…KEVEPSS 82%analysed8.8CVE-2010-0249Microsoft Internet Explorer use-after-free enables remote code executionInternet Explorer 6, 7 and 8 mishandle objects in memory, leaving a dangling pointer that can be reused after the object is freed. A remote attacker …KEVEPSS 92%analysed7.8CVE-2020-9715Adobe Acrobat and Reader use-after-free allows code executionAdobe Acrobat and Reader contain a use-after-free (CWE-416) flaw affecting versions 2020.009.20074 and earlier, 2020.001.30002, 2017.011.30171 and ea…KEVEPSS 49%analysed8.8CVE-2026-5281Google Chrome Dawn use-after-free allows remote code executionChrome versions before 146.0.7680.178 contain a use-after-free flaw in the Dawn graphics component. An attacker who has already compromised the rende…KEVEPSS 0.70%analysed

Source: NIST National Vulnerability Database (record CVE-2026-50738), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.