UBUNTU-CVE-2026-14672 (CVE-2026-14672)

Vulnerability from osv_ubuntu – Published: 2026-08-13 13:17 – Updated: 2026-09-02 16:12 – Source website
VLAI
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.

Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libecpg-compat3",
            "binary_version": "9.3.24-0ubuntu0.14.04+esm1"
          },
          {
            "binary_name": "libecpg6",
            "binary_version": "9.3.24-0ubuntu0.14.04+esm1"
          },
          {
            "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_name": "postgresql-doc-9.3",
            "binary_version": "9.3.24-0ubuntu0.14.04+esm1"
          },
          {
            "binary_name": "postgresql-plperl-9.3",
            "binary_version": "9.3.24-0ubuntu0.14.04+esm1"
          },
          {
            "binary_name": "postgresql-plpython-9.3",
            "binary_version": "9.3.24-0ubuntu0.14.04+esm1"
          },
          {
            "binary_name": "postgresql-plpython3-9.3",
            "binary_version": "9.3.24-0ubuntu0.14.04+esm1"
          },
          {
            "binary_name": "postgresql-pltcl-9.3",
            "binary_version": "9.3.24-0ubuntu0.14.04+esm1"
          },
          {
            "binary_name": "postgresql-server-dev-9.3",
            "binary_version": "9.3.24-0ubuntu0.14.04+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "postgresql-9.3",
        "purl": "pkg:deb/ubuntu/postgresql-9.3@9.3.24-0ubuntu0.14.04+esm1?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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": {
        "availability": "No subscription required",
        "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_name": "postgresql-16",
            "binary_version": "16.15-0ubuntu0.24.04.1"
          },
          {
            "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_name": "postgresql-plpython3-16",
            "binary_version": "16.15-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "postgresql-pltcl-16",
            "binary_version": "16.15-0ubuntu0.24.04.1"
          },
          {
            "binary_name": "postgresql-server-dev-16",
            "binary_version": "16.15-0ubuntu0.24.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "postgresql-16",
        "purl": "pkg:deb/ubuntu/postgresql-16@16.15-0ubuntu0.24.04.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "16.15-0ubuntu0.24.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libecpg-compat3",
            "binary_version": "18.6-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "libecpg6",
            "binary_version": "18.6-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "libpgtypes3",
            "binary_version": "18.6-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "libpq-oauth",
            "binary_version": "18.6-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "libpq5",
            "binary_version": "18.6-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "postgresql-18",
            "binary_version": "18.6-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "postgresql-18-jit",
            "binary_version": "18.6-0ubuntu0.26.04.1"
          },
          {
            "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_name": "postgresql-plperl-18",
            "binary_version": "18.6-0ubuntu0.26.04.1"
          },
          {
            "binary_name": "postgresql-plpython3-18",
            "binary_version": "18.6-0ubuntu0.26.04.1"
          },
          {
            "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"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "postgresql-18",
        "purl": "pkg:deb/ubuntu/postgresql-18@18.6-0ubuntu0.26.04.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "18.6-0ubuntu0.26.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "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"
      ]
    }
  ],
  "aliases": [],
  "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.",
  "id": "UBUNTU-CVE-2026-14672",
  "modified": "2026-09-02T16:12:05Z",
  "published": "2026-08-13T13:17:00Z",
  "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"
    }
  ],
  "related": [
    "USN-8653-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-14672"
  ]
}



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