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PostgreSQL discloses MD5-hashed passwords via covert timing channel

PostgreSQL · CVE-2026-6478
0 news outlets0 CERTs and agencies0 researchers

What is it?

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.

Evidence

No coverage recorded yet.

Exploitation

  • Public proof of concept
  • Exploited in the wild
  • Listed as known exploited
CVSS
6.5
EPSS
0.6%
First seen
1 d ago
Status
corroborated

All PostgreSQL vulnerabilities