vulnerability
PostgreSQL: CVE-2026-6478: PostgreSQL discloses MD5-hashed passwords via covert timing channel
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 6 | (AV:N/AC:L/Au:N/C:P/I:P/A:N) | May 14, 2026 | May 14, 2026 | May 17, 2026 |
Severity
6
CVSS
(AV:N/AC:L/Au:N/C:P/I:P/A:N)
Published
May 14, 2026
Added
May 14, 2026
Modified
May 17, 2026
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.
Solutions
postgres-upgrade-14_23postgres-upgrade-15_18postgres-upgrade-16_14postgres-upgrade-17_10postgres-upgrade-18_4
Rapid7 Labs
2026 Global Threat Landscape Report
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