CVE-2026-14672 — PostgreSQL observable response discrepancy with non-default scram_iterations provides user existence oracle

CVE-2026-14672

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

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
n/a / PostgreSQL	affected 18 before 18.6; affected 17 before 17.11; affected 16 before 16.15

CWE

CWE-204

References

https://www.postgresql.org/support/security/CVE-2026-14672/

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.