CVE-2026-50738
pglogical Use-After-Free Vulnerability
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.
INFO
Published Date :
July 28, 2026, 7:17 p.m.
Last Modified :
Oct. 23, 2026, 11:10 p.m.
Remotely Exploit :
Yes !
Source :
20be33e2-bf35-4d13-8fad-18bd2f3e3659
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | HIGH | 20be33e2-bf35-4d13-8fad-18bd2f3e3659 | ||||
| CVSS 4.0 | HIGH | 20be33e2-bf35-4d13-8fad-18bd2f3e3659 |
Solution
- Update pglogical to the latest version.
- Ensure workers are managed correctly.
- Apply vendor-provided patches.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-50738.
| URL | Resource |
|---|---|
| https://www.enterprisedb.com/docs/security/advisories/cve202650738/ | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-50738 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-50738
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-50738 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-50738 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 23, 2026
Action Type Old Value New Value Added Translation Title: pglogical de EnterpriseDB, Description: Una condición de uso después de liberación existe en el código de señalización de trabajadores de pglogical, donde una estructura de trabajador puede ser desreferenciada después de que el slot subyacente haya sido liberado o reciclado durante eventos normales del ciclo de vida del trabajador. La condición es alcanzable durante la operación normal de replicación, incluso por un usuario con pocos privilegios capaz de influir en el inicio, detención y reinicio de los trabajadores a través de operaciones pglogical permitidas. En el caso típico, la condición provoca la caída de los trabajadores de replicación, causando un impacto en la disponibilidad. En el peor de los casos, un uso después de liberación en un backend de PostgreSQL puede ser aprovechado como una primitiva de ejecución remota de código con los privilegios de ese backend. -
Initial Analysis by [email protected]
Aug. 24, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:enterprisedb:pglogical:*:*:*:*:*:postgresql:*:* versions from (including) 2.0.0 up to (excluding) 2.4.8 Added Reference Type EnterpriseDB Corporation: https://www.enterprisedb.com/docs/security/advisories/cve202650738/ Types: Vendor Advisory -
New CVE Received by 20be33e2-bf35-4d13-8fad-18bd2f3e3659
Jul. 28, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'EnterpriseDB', 'product': 'pglogical', 'versions': [{'status': 'affected', 'version': '2', 'lessThan': '2.4.8', 'versionType': 'semver'}], 'defaultStatus': 'affected'}] Added 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. Added CVSS V4.0 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:X/V:X/RE:X/U:X Added CWE CWE-416 Added Reference https://www.enterprisedb.com/docs/security/advisories/cve202650738/ -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 28, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-50738', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-28T18:44:48.974347Z'}