Vulnerability Report

CVE-2026-6478

Title: Covert timing channel in MD5 password comparison

Other

Proof Of Concept

No public PoC currently indexed for CVE-2026-6478.

CWE Category CWE-385

Published Date May 14, 2026

Modified Date Jul 24, 2026

Exploit Status Not Found

Score 6.5 CVSS v3.1

Exploit Probability (EPSS)

0.56%

Vulnerability Summary

CVE-2026-6478: 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.

Impacted Vendors

postgresql 1

anynines 1

Reference Links

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

CVSS v3.1

Source Entity f86ef6dc-4d3a-42ad-8f28-e6d5547a5007

Severity MEDIUM

6.5

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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