CVE-2026-6478

MEDIUM

PostgreSQL discloses MD5-hashed passwords via covert timing channel

Title source: cna
STIX 2.1

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.

References (33)

Core 33
Core References

Scores

CVSS v3 6.5
EPSS 0.0056
EPSS Percentile 42.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-385
Status published
Products (6)
None/PostgreSQL < 14.23
None/PostgreSQL 15 - 15.18
None/PostgreSQL 16 - 16.14
None/PostgreSQL 17 - 17.10
None/PostgreSQL 18 - 18.4
postgresql/postgresql < 14.23
Published May 14, 2026
Tracked Since May 14, 2026