{"id":"BIT-postgresql-2026-14672","summary":"PostgreSQL observable response discrepancy with non-default scram_iterations provides user existence oracle","details":"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.","aliases":["CVE-2026-14672"],"modified":"2026-08-19T09:45:19.461551037Z","published":"2026-08-19T08:52:38.472Z","database_specific":{"cpes":["cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*"],"severity":"Medium"},"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-14672"},{"type":"WEB","url":"https://www.postgresql.org/support/security/CVE-2026-14672/"}],"affected":[{"package":{"name":"postgresql","ecosystem":"Bitnami","purl":"pkg:bitnami/postgresql"},"ranges":[{"type":"SEMVER","events":[{"introduced":"16.0.0"},{"fixed":"16.15.0"},{"introduced":"17.0.0"},{"fixed":"17.11.0"},{"introduced":"18.0.0"},{"fixed":"18.5.0"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/postgresql/BIT-postgresql-2026-14672.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}],"schema_version":"1.9.0"}