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6.5mediumMedium

CVE-2026-6478

Postgresql Postgresql

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.

Exploitation status

  • A vendor advisory or patch reference has been published.

What the metrics mean

  • It is reachable over a network, without needing local access.
  • For an attacker who can reach it, no special conditions are needed to exploit it.
  • To exploit it, no account is needed.
  • Beyond that, no action by a user is required.

Scoring

CVSS
6.5 (v3.1)
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness
CWE-385
Assigned by
f86ef6dc-4d3a-42ad-8f28-e6d5547a5007

Dates

Published
2026-05-14
Last modified
2026-08-25
Sources
NVD

Affected products

  • Postgresql Postgresql- 14.23, 15.0 - 15.18, 16.0 - 16.14, 17.0 - 17.10, 18.0 - 18.4

As listed in the NVD configuration data. Not a statement about your estate.

References