Riskcovery

CVE-2026-6478

PostgreSQL discloses MD5-hashed passwords via covert timing channel

State
Published
Severity
6.5 Medium
Published
May 14, 2026
Updated
Aug 25, 2026
Reserved
Apr 17, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.16.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NPostgreSQL
3.18.2 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:Nredhat-SADP

Weaknesses

Affected Products

ProductVersions
PostgreSQLn/a
  • 18 to before 18.4Affected
  • 17 to before 17.10Affected
  • 16 to before 16.14Affected
  • 15 to before 15.18Affected
  • before 14.23Affected

References

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