CVE-2026-6478
Last modified
CVE-2026-6478 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 0.24% chance of exploitation in the next 30 days.
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Postgresql | Postgresql | < 14.23 |
| Postgresql | Postgresql | >= 15.0, < 15.18 |
| Postgresql | Postgresql | >= 16.0, < 16.14 |
| Postgresql | Postgresql | >= 17.0, < 17.10 |
| Postgresql | Postgresql | >= 18.0, < 18.4 |
References
- https://www.postgresql.org/support/security/CVE-2026-6478/Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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