PT-2026-40923 · Postgresql Global Development Group+3 · Postgresql+2

Joe Conway · Published 2026-05-14 · Updated 2026-05-22 · CVE-2026-6478

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions PostgreSQL versions prior to 18.4 PostgreSQL versions prior to 17.10 PostgreSQL versions prior to 16.14 PostgreSQL versions prior to 15.18 PostgreSQL versions prior to 14.23

Description A covert timing channel exists during the comparison of MD5-hashed passwords in the authentication process. This allows an attacker to recover user credentials to gain authentication. This issue does not affect scram-sha-256 passwords, which are the default in all supported releases, but may impact databases with MD5-hashed passwords resulting from upgrades from version 13 or earlier.

Recommendations Update to version 18.4 or later. Update to version 17.10 or later. Update to version 16.14 or later. Update to version 15.18 or later. Update to version 14.23 or later.

Fix

Weakness Enumeration

CWE-208

CWE-385

Related Identifiers

BDU:2026-07097

BIT-POSTGRESQL-2026-6478

CVE-2026-6478

ECHO-4419-6A8C-5FC6

OESA-2026-2381

OESA-2026-2382

OESA-2026-2413

OESA-2026-2414

OPENSUSE-SU-2026:10806-1

OPENSUSE-SU-2026:10807-1

OPENSUSE-SU-2026:10808-1

OPENSUSE-SU-2026:10809-1

OPENSUSE-SU-2026:10828-1

USN-8294-1

Affected Products

Linuxmint

Postgresql

Ubuntu

References · 66

• https://ubuntu.com/security/CVE-2026-6479 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-6474 · Security Note
• https://postgresql.org/support/security/CVE-2026-6478 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-6575 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2382 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-6478 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-6479 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2026:10828-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10808-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-6478 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-6472 · Vendor Advisory
• https://osv.dev/vulnerability/OESA-2026-2413 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-6475 · Security Note
• https://ubuntu.com/security/CVE-2026-6637 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-6473 · Vendor Advisory