CVE-2026-6638

PostgreSQL REFRESH PUBLICATION allows SQL injection via table name

State: Published
Severity: 3.7 Low
Published: May 14, 2026
Updated: May 14, 2026
Reserved: Apr 19, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	3.7 Low	CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N	PostgreSQL

Weaknesses

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

Affected Products

Product	Versions
PostgreSQLn/a	18 to before 18.4Affected 17 to before 17.10Affected 16 to before 16.14Affected

References

https://www.postgresql.org/support/security/CVE-2026-6638/

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