PostgreSQL discloses MD5-hashed passwords via covert timing channel_CVE-2026-6478

6.5 / 10

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

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.

Basic Information

ID CVE-2026-6478

Source PostgreSQL

Published May 14, 2026 at 13:00

Affected Product

Vendor n/a

Product PostgreSQL

Version 18

Affected Versions n/a PostgreSQL 18
n/a PostgreSQL 17
n/a PostgreSQL 16
n/a PostgreSQL 15
n/a PostgreSQL 0

CWE Classification

CWE-385

References

www.postgresql.org /support/security/CVE-2026-6478/

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    "published": "2026-05-14T13:00:13.174Z",
    "modified": "2026-05-14T13:00:13.174Z",
    "type": "cve",
    "title": "PostgreSQL discloses MD5-hashed passwords via covert timing channel",
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