CVE-2026-14672
MediumCVSS 5.3Exploitation Probability (EPSS)
Low risk33th percentile - higher than 33% of all known CVEs
Summary
An observable response discrepancy in PostgreSQL SCRAM authentication allows an unauthenticated user to test the existence of a user by 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. Within major versions 16-18, minor versions before PostgreSQL 18.5, 17.11, and 16.15 are affected; versions before PostgreSQL 16 are unaffected.
Risk Assessment
The risk includes user enumeration, which may facilitate brute-force or phishing attacks targeting specific accounts.
Recommendation
Upgrade PostgreSQL to a patched version and consider using uniform scram_iterations settings for all users.
Original NVD description (English source)
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 18.5, 17.11, and 16.15 are affected. Versions before PostgreSQL 16 are unaffected.