CVE-2026-6478 Affecting postgresql-upgrade package, versions <0:13.23-3.module+el8.10.0+90927+50389279


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.56% (45th percentile)

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  • Snyk IDSNYK-ORACLE8-POSTGRESQLUPGRADE-17390753
  • published20 Jun 2026
  • disclosed14 May 2026

Introduced: 14 May 2026

CVE-2026-6478  (opens in a new tab)

How to fix?

Upgrade Oracle:8 postgresql-upgrade to version 0:13.23-3.module+el8.10.0+90927+50389279 or higher.
This issue was patched in ELSA-2026-28208.

NVD Description

Note: Versions mentioned in the description apply only to the upstream postgresql-upgrade package and not the postgresql-upgrade package as distributed by Oracle. See How to fix? for Oracle:8 relevant fixed versions and status.

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

CVSS Base Scores

version 3.1