{"id":"CVE-2026-14672","title":"Observable response discrepancy in PostgreSQL SCRAM authentication allows an unauthenticated user to test the existence of a user via observing the SCRAM iteration count","summary":"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_iterati…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cwe":["CWE-204"],"vendor":"postgresql","product":"postgresql","affected":["postgresql >= 14.0, < 14.24","postgresql >= 15.0, < 15.19","postgresql >= 16.0, < 16.15","postgresql >= 17.0, < 17.11","postgresql >= 18.0, < 18.5"],"patched":["postgresql 18.5"],"published":"2026-08-13","updated":"2026-08-29","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-14672","references":[{"url":"https://www.postgresql.org/support/security/CVE-2026-14672/","label":"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007"}],"tags":["nvd"],"epss":0.00252,"epssPercentile":0.16925,"ingestedAt":"2026-08-29T23:43:53.250Z","slug":"CVE-2026-14672","body":"## Overview\n\nObservable 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.\n\n## Affected\n\n- `postgresql >= 14.0, < 14.24`\n- `postgresql >= 15.0, < 15.19`\n- `postgresql >= 16.0, < 16.15`\n- `postgresql >= 17.0, < 17.11`\n- `postgresql >= 18.0, < 18.5`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `postgresql 18.5`","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}