CVE-2026-6638 - Vulnerability Details - OpenCVE

SQL injection in PostgreSQL logical replication ALTER SUBSCRIPTION ... REFRESH PUBLICATION allows a subscriber table creator to execute arbitrary SQL with the subscription's publication-side credentials. The attack takes effect at the next REFRESH PUBLICATION. Within major versions 16, 17, and 18, minor versions before PostgreSQL 18.4, 17.10, and 16.14 are affected. Versions before PostgreSQL 16 are unaffected.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Vendors	Products
Postgresql	Postgresql

No data.

No data.

References

Link	Providers
https://www.spirityenterprise.com/pentest
https://www.postgresql.org/support/security/CVE-2026-6638/

History

Thu, 14 May 2026 16:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Thu, 14 May 2026 15:15:00 +0000

Type	Values Removed	Values Added
First Time appeared		Postgresql Postgresql postgresql
Vendors & Products		Postgresql Postgresql postgresql

Thu, 14 May 2026 13:30:00 +0000

Type	Values Removed	Values Added
Description		SQL injection in PostgreSQL logical replication ALTER SUBSCRIPTION ... REFRESH PUBLICATION allows a subscriber table creator to execute arbitrary SQL with the subscription's publication-side credentials. The attack takes effect at the next REFRESH PUBLICATION. Within major versions 16, 17, and 18, minor versions before PostgreSQL 18.4, 17.10, and 16.14 are affected. Versions before PostgreSQL 16 are unaffected.
Title		PostgreSQL REFRESH PUBLICATION allows SQL injection via table name
Weaknesses		CWE-89
References		https://www.postgresql.org/support/security/CVE-2026-6638/
Metrics		cvssV3_1 `{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N'}`

MITRE

Status: PUBLISHED

Assigner: PostgreSQL

Published: 2026-05-14T13:00:15.848Z

Updated: 2026-05-14T15:28:30.735Z

Reserved: 2026-04-19T19:58:21.650Z

Link: CVE-2026-6638

Vulnrichment

Updated: 2026-05-14T15:28:27.447Z

NVD

Status : Awaiting Analysis

Published: 2026-05-14T14:16:25.937

Modified: 2026-05-14T16:21:23.190

Link: CVE-2026-6638

Redhat

No data.

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