First Published: 2026/08/13
Important: This assessment evaluates the impact of CVE-2026-16239 on EDB products and services. It links to and details the CVE and supplements that information with EDB's own assessment.
Summary
Type confusion in PostgreSQL portal handling for EXECUTE and FETCH statements allows a database user to re-declare a cursor or other portal with a different type, corrupting the assumed type of the portal. This can be leveraged to disclose server memory contents and to execute arbitrary code as the operating system user running the database. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.
Vulnerability details
CVE-ID: CVE-2026-16239
CVE Publish Date: 2026/08/13
CVSS Base Score: 8.8
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products and versions
PostgreSQL
- All versions prior to 18.5
- All versions prior to 17.11
- All versions prior to 16.15
- All versions prior to 15.19
- All versions prior to 14.24
EnterpriseDB Postgres Advanced Server (EPAS)
- All versions prior to 18.5
- All versions prior to 17.11
- All versions prior to 16.15
- All versions prior to 15.19
- All versions prior to 14.24
EnterpriseDB Postgres Extended (PGE)
- All versions prior to 18.5
- All versions prior to 17.11
- All versions prior to 16.15
- All versions prior to 15.19
- All versions prior to 14.24
CloudNativePG
- All operand versions prior to 18.5
- All operand versions prior to 17.11
- All operand versions prior to 16.15
- All operand versions prior to 15.19
- All operand versions prior to 14.24
WarehousePG
- All 6.x versions up to and including 6.27.5
- All 7.x versions up to and including 7.5.0
Remediation/fixes
PostgreSQL
| Affected Version | Fixed In | Fix Published |
|---|---|---|
| prior to 18.5 | 18.5 | 2026-08-13 |
| prior to 17.11 | 17.11 | 2026-08-13 |
| prior to 16.15 | 16.15 | 2026-08-13 |
| prior to 15.19 | 15.19 | 2026-08-13 |
| prior to 14.24 | 14.24 | 2026-08-13 |
EDB Postgres Extended Server
| Affected Version | Fixed In | Fix Published |
|---|---|---|
| prior to 18.5 | 18.5 | 2026-08-13 |
| prior to 17.11 | 17.11 | 2026-08-13 |
| prior to 16.15 | 16.15 | 2026-08-13 |
| prior to 15.19 | 15.19 | 2026-08-13 |
| prior to 14.24 | 14.24 | 2026-08-13 |
EDB Postgres Advanced Server
| Affected Version | Fixed In | Fix Published |
|---|---|---|
| prior to 18.5 | 18.5 | 2026-08-13 |
| prior to 17.11 | 17.11 | 2026-08-13 |
| prior to 16.15 | 16.15 | 2026-08-13 |
| prior to 15.19 | 15.19 | 2026-08-13 |
| prior to 14.24 | 14.24 | 2026-08-13 |
CloudNativePG
Customer should update to the fixed version of the PostgreSQL operands.
WarehousePG
Fixes will be included in the next minor release of WarehousePG 6.x and 7.x.
References
- CVSS Calculator v3.1
- NVD - CVE-2026-16239 Detail
- https://www.postgresql.org/support/security/CVE-2026-16239/
Related information
Acknowledgement
Source: PostgreSQL.org