CVE-2026-6638

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.

CVSS v3 3.7 LOW

3.7^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.2 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://www.postgresql.org/support/security/CVE-2026-6638/	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:postgresql:postgresql::::::::
	cpe:2.3:a:postgresql:postgresql::::::::
	cpe:2.3:a:postgresql:postgresql::::::::

History

18 May 2026, 14:14

Type	Values Removed	Values Added
CPE		cpe:2.3:a:postgresql:postgresql::::::::
First Time		Postgresql Postgresql postgresql
References	~~() https://www.postgresql.org/support/security/CVE-2026-6638/ -~~	() https://www.postgresql.org/support/security/CVE-2026-6638/ - Patch, Vendor Advisory

14 May 2026, 14:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-14 14:16

Updated : 2026-05-18 14:14

NVD link : CVE-2026-6638

Mitre link : CVE-2026-6638

CVE.ORG link : CVE-2026-6638

JSON object : View

Products Affected

postgresql

postgresql

CWE

CWE-89

Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

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