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VULNERABILITIES

CVE-2026-6478 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: redhat-SADPCVSS-B:8.2 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://access.redhat.com/errata/RHSA-2026:21182 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:22878 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:26181 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:26203 redhat-SADP
https://access.redhat.com/errata/RHSA-2026:26204 redhat-SADP

see all 38 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-385Covert Timing Channelredhat-SADP
CWE-385Covert Timing ChannelPostgreSQL

Affected Products

ProductVersions
postgresql postgresql
< 14.23
>= 15.0, < 15.18
>= 16.0, < 16.14
>= 17.0, < 17.10
>= 18.0, < 18.4

CPE

  • cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

14 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-6478
NVD Published Date:
May 14, 2026
NVD Last Modified:
Aug 25, 2026
Source:
PostgreSQL