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Cyber Security Agency of Singapore
Alerts

High-Severity Vulnerability in PostgreSQL

9 September 2026

Attackers can exploit a high-severity vulnerability in PostgreSQL to execute arbitrary code on the affected system. Patch promptly.

Background

PostgreSQL has released security updates to address a missing authorisation vulnerability (CVE-2026-6471) in the logical decoding feature in PostgreSQL. This vulnerability has a Common Vulnerability Scoring System (CVSS v3.1) score of 7.2 out of 10.

Impact

Successful exploitation of this vulnerability could allow a non-superuser with REPLICATION privileges to run arbitrary code as the operating-system user running the database server. 

Affected Products

This vulnerability affects PostgreSQL versions prior to 18.6, 17.11, 16.15, 15.19, and 14.24.

Recommendations

Users and administrators of affected products are advised to update to the latest versions promptly.

References

https://www.postgresql.org/support/security/CVE-2026-6471/ (opens in new tab)

https://nvd.nist.gov/vuln/detail/CVE-2026-6471 (opens in new tab)