CVE-2026-6638
Published:May 14, 2026
Updated:May 18, 2026
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.
Affected Packages
https://github.com/postgres/postgres.git (GITHUB):
Affected version(s) >=REL_18_0 <REL_18_4Fix Suggestion:
Update to version REL_18_4https://github.com/postgres/postgres.git (GITHUB):
Affected version(s) >=REL_17_0 <REL_17_10Fix Suggestion:
Update to version REL_17_10https://github.com/postgres/postgres.git (GITHUB):
Affected version(s) >=REL_16_0 <REL_16_14Fix Suggestion:
Update to version REL_16_14Related Resources (1)
Do you need more information?
Contact UsCVSS v4
Base Score:
2.1
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
PASSIVE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
3.7
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
EPSS
Base Score:
0.02