Vulnocalypse
Back to feed
30impact

PostgreSQL observable response discrepancy with non-default scram_iterations provides user existence oracle

PostgreSQL · CVE-2026-14672
0 news outlets0 CERTs and agencies0 researchers

What is it?

Observable response discrepancy in PostgreSQL SCRAM authentication allows an unauthenticated user to test the existence of a user via observing the SCRAM iteration count. This requires the probed user to have a non-default scram_iterations count, because the authentication challenge for a nonexistent user reports the default scram_iterations. Within major versions 16-18, minor versions before PostgreSQL 18.6, 17.11, and 16.15 are affected. Versions before PostgreSQL 16 are unaffected.

Evidence

No coverage recorded yet.

Exploitation

  • Public proof of concept
  • Exploited in the wild
  • Listed as known exploited
CVSS
5.3
EPSS
0.3%
First seen
7 d ago
Status
corroborated

All PostgreSQL vulnerabilities