CVE-2026-6478 Affecting postgresql:18/postgresql-docs package, versions <0:18.4-2.module_el9.8.0+280+5ad12178


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.56% (43rd percentile)

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  • Snyk IDSNYK-ALMALINUX9-POSTGRESQL-17901136
  • published9 Jul 2026
  • disclosed16 Jun 2026

Introduced: 16 Jun 2026

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

How to fix?

Upgrade AlmaLinux:9 postgresql:18/postgresql-docs to version 0:18.4-2.module_el9.8.0+280+5ad12178 or higher.
This issue was patched in ALSA-2026:26204.

NVD Description

Note: Versions mentioned in the description apply only to the upstream postgresql:18/postgresql-docs package and not the postgresql:18/postgresql-docs package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 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