{"id":"UBUNTU-CVE-2026-14672","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 18.6, 17.11, and 16.15 are affected.  Versions before PostgreSQL 16 are unaffected.","modified":"2026-09-02T19:39:44.384228763Z","published":"2026-08-13T13:17:00Z","related":["USN-8653-1"],"upstream":["CVE-2026-14672"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-14672"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-14672"},{"type":"REPORT","url":"https://www.postgresql.org/support/security/CVE-2026-14672/"},{"type":"REPORT","url":"https://www.postgresql.org/about/news/postgresql-186-1711-1615-1519-1424-and-19-beta-3-released-3365/"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8653-1"}],"affected":[{"package":{"name":"postgresql-9.3","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/postgresql-9.3?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.3.1-1","9.3.2-1","9.3.2-1ubuntu1","9.3.2-1ubuntu2","9.3.3-1","9.3.3-1bzr1","9.3.3-1bzr2","9.3.4-1","9.3.5-0ubuntu0.14.04.1","9.3.6-0ubuntu0.14.04","9.3.7-0ubuntu0.14.04","9.3.8-0ubuntu0.4.04","9.3.9-0ubuntu0.14.04","9.3.10-0ubuntu0.14.04","9.3.11-0ubuntu0.14.04","9.3.12-0ubuntu0.14.04","9.3.13-0ubuntu0.14.04","9.3.14-0ubuntu0.14.04","9.3.15-0ubuntu0.14.04","9.3.16-0ubuntu0.14.04","9.3.17-0ubuntu0.14.04","9.3.18-0ubuntu0.14.04.1","9.3.19-0ubuntu0.14.04","9.3.20-0ubuntu0.14.04","9.3.21-0ubuntu0.14.04","9.3.22-0ubuntu0.14.04","9.3.23-0ubuntu0.14.04","9.3.24-0ubuntu0.14.04","9.3.24-0ubuntu0.14.04+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libecpg-compat3","binary_version":"9.3.24-0ubuntu0.14.04+esm1"},{"binary_version":"9.3.24-0ubuntu0.14.04+esm1","binary_name":"libecpg6"},{"binary_name":"libpgtypes3","binary_version":"9.3.24-0ubuntu0.14.04+esm1"},{"binary_name":"libpq5","binary_version":"9.3.24-0ubuntu0.14.04+esm1"},{"binary_name":"postgresql-9.3","binary_version":"9.3.24-0ubuntu0.14.04+esm1"},{"binary_name":"postgresql-client-9.3","binary_version":"9.3.24-0ubuntu0.14.04+esm1"},{"binary_name":"postgresql-contrib-9.3","binary_version":"9.3.24-0ubuntu0.14.04+esm1"},{"binary_version":"9.3.24-0ubuntu0.14.04+esm1","binary_name":"postgresql-doc-9.3"},{"binary_name":"postgresql-plperl-9.3","binary_version":"9.3.24-0ubuntu0.14.04+esm1"},{"binary_version":"9.3.24-0ubuntu0.14.04+esm1","binary_name":"postgresql-plpython-9.3"},{"binary_name":"postgresql-plpython3-9.3","binary_version":"9.3.24-0ubuntu0.14.04+esm1"},{"binary_version":"9.3.24-0ubuntu0.14.04+esm1","binary_name":"postgresql-pltcl-9.3"},{"binary_name":"postgresql-server-dev-9.3","binary_version":"9.3.24-0ubuntu0.14.04+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14672.json"}},{"package":{"name":"postgresql-16","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/postgresql-16?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"16.15-0ubuntu0.24.04.1"}]}],"versions":["16.0-2","16.1-1","16.1-1build1","16.1-1build3","16.2-1","16.2-1ubuntu2","16.2-1ubuntu3","16.2-1ubuntu4","16.3-0ubuntu0.24.04.1","16.4-0ubuntu0.24.04.1","16.4-0ubuntu0.24.04.2","16.6-0ubuntu0.24.04.1","16.8-0ubuntu0.24.04.1","16.9-0ubuntu0.24.04.1","16.10-0ubuntu0.24.04.1","16.11-0ubuntu0.24.04.1","16.13-0ubuntu0.24.04.1","16.14-0ubuntu0.24.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libecpg-compat3","binary_version":"16.15-0ubuntu0.24.04.1"},{"binary_name":"libecpg6","binary_version":"16.15-0ubuntu0.24.04.1"},{"binary_name":"libpgtypes3","binary_version":"16.15-0ubuntu0.24.04.1"},{"binary_name":"libpq5","binary_version":"16.15-0ubuntu0.24.04.1"},{"binary_version":"16.15-0ubuntu0.24.04.1","binary_name":"postgresql-16"},{"binary_name":"postgresql-client-16","binary_version":"16.15-0ubuntu0.24.04.1"},{"binary_name":"postgresql-doc-16","binary_version":"16.15-0ubuntu0.24.04.1"},{"binary_name":"postgresql-plperl-16","binary_version":"16.15-0ubuntu0.24.04.1"},{"binary_version":"16.15-0ubuntu0.24.04.1","binary_name":"postgresql-plpython3-16"},{"binary_name":"postgresql-pltcl-16","binary_version":"16.15-0ubuntu0.24.04.1"},{"binary_version":"16.15-0ubuntu0.24.04.1","binary_name":"postgresql-server-dev-16"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14672.json"}},{"package":{"name":"postgresql-18","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/postgresql-18?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"18.6-0ubuntu0.26.04.1"}]}],"versions":["18.0-1","18.1-1","18.1-1ubuntu1","18.1-1ubuntu2","18.1-2","18.3-1","18.4-0ubuntu0.26.04.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"18.6-0ubuntu0.26.04.1","binary_name":"libecpg-compat3"},{"binary_name":"libecpg6","binary_version":"18.6-0ubuntu0.26.04.1"},{"binary_version":"18.6-0ubuntu0.26.04.1","binary_name":"libpgtypes3"},{"binary_version":"18.6-0ubuntu0.26.04.1","binary_name":"libpq-oauth"},{"binary_name":"libpq5","binary_version":"18.6-0ubuntu0.26.04.1"},{"binary_name":"postgresql-18","binary_version":"18.6-0ubuntu0.26.04.1"},{"binary_version":"18.6-0ubuntu0.26.04.1","binary_name":"postgresql-18-jit"},{"binary_name":"postgresql-client-18","binary_version":"18.6-0ubuntu0.26.04.1"},{"binary_name":"postgresql-doc-18","binary_version":"18.6-0ubuntu0.26.04.1"},{"binary_version":"18.6-0ubuntu0.26.04.1","binary_name":"postgresql-plperl-18"},{"binary_version":"18.6-0ubuntu0.26.04.1","binary_name":"postgresql-plpython3-18"},{"binary_name":"postgresql-pltcl-18","binary_version":"18.6-0ubuntu0.26.04.1"},{"binary_name":"postgresql-server-dev-18","binary_version":"18.6-0ubuntu0.26.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-14672.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}