CVE-2026-6478 Affecting postgresql:15/postgresql package, versions <0:15.18-1.module_el8.10.0+4195+4569d728


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.56% (43rd percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-ALMALINUX8-POSTGRESQL-17372399
  • published18 Jun 2026
  • disclosed22 Jun 2026

Introduced: 18 Jun 2026

NewCVE-2026-6478  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 postgresql:15/postgresql to version 0:15.18-1.module_el8.10.0+4195+4569d728 or higher.
This issue was patched in ALSA-2026:26181.

NVD Description

Note: Versions mentioned in the description apply only to the upstream postgresql:15/postgresql package and not the postgresql:15/postgresql package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

Covert timing channel in comparison of MD5-hashed password in PostgreSQL authentication allows an attacker to recover user credentials sufficient to authenticate. This does not affect scram-sha-256 passwords, the default in all supported releases. However, current databases may have MD5-hashed passwords originating in upgrades from PostgreSQL 13 or earlier. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

CVSS Base Scores

version 3.1