What is CVE-2026-6478?

CVE-2026-6478 is a medium-severity vulnerability in Postgresql, classified under CWE-385. CVSS score: 6.5/10. Published 2026-05-14.

How severe is CVE-2026-6478?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Postgresql

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…

EPSS: 0.001 (22.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Postgresql
N/a Postgresql — versions 18, 17, 16

Weakness classification (CWE)

CWE-385

References

f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-6478?: CVE-2026-6478 is a medium-severity vulnerability in Postgresql, classified under CWE-385. CVSS score: 6.5/10. Published 2026-05-14.
How severe is CVE-2026-6478?: Medium severity. CVSS v3 base score is 6.5 out of 10.