UpHeron
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Servers and applications

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 releases. However, current databases may have MD5-hashed passwords originating in upgrades from PostgreSQL 13 or earlier. Versions before PostgreSQL 18.4,…

Severity
Medium 6.5
Published
14 May 2026
Last changed
25 Aug 2026
Added to UpHeron
16 Oct 2026
Fixed in
14.23, 15.18, 16.14, 17.10, 18.4
Sources
NVD

Affected software

SoftwareAffected versions
PostgreSQLServers and applications · cpe:a:postgresql:postgresql
  • Every version before 14.23
  • From 15.0 before 15.18
  • From 16.0 before 16.14
  • From 17.0 before 17.10
  • From 18.0 before 18.4

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-6478
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-6478