Security Advisory

CVE-2026-6478

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-05-14 13:00:13

Last updated 2026-07-24 12:05:27

Assigner PostgreSQL

CVSS score 6.5

State PUBLISHED

Description

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.

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