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VULNERABILITIES

CVE-2026-6638 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:8.8 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA: PostgreSQLCVSS-B:3.7 LOWVector:CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://www.postgresql.org/support/security/CVE-2026-6638/ PostgreSQLPatchVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')PostgreSQL

Affected Products

ProductVersions
postgresql postgresql
>= 16.0, < 16.14
>= 17.0, < 17.10
>= 18.0, < 18.4

CPE

  • cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-6638
NVD Published Date:
May 14, 2026
NVD Last Modified:
Jun 17, 2026
Source:
PostgreSQL