{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "5.5.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "ba9405542acf24dd881845b935cab8b165854361"
            },
            {
              "fixed": "f7e83b9c441c7e97066d815bbe14e02a9dc5ff94"
            }
          ],
          "repo": "https://github.com/pgpartman/pg_partman",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-fm3m-9fh7-mqfc"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-89"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61818.json"
  },
  "details": "pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, undo_partition() reads part_config.time_encoder as unrestricted text and interpolates it without identifier quoting into a dynamically executed SELECT statement. A role with partman_user access can store SQL rather than a function name, and the SQL executes with the privileges of the caller that invokes undo_partition(). The function is not part of the default background-worker path, which limits the automatic superuser escalation described by the related create-partition vulnerability, but a privileged caller can still have its available confidentiality, integrity, and availability permissions abused. This issue is fixed in version 5.5.0.",
  "id": "CVE-2026-61818",
  "modified": "2026-09-20T11:31:00.490780922Z",
  "published": "2026-09-18T19:47:30.083Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/pgpartman/pg_partman/releases/tag/v5.5.0"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61818.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/pgpartman/pg_partman/security/advisories/GHSA-fm3m-9fh7-mqfc"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-61818"
    },
    {
      "type": "FIX",
      "url": "https://github.com/pgpartman/pg_partman/commit/ba9405542acf24dd881845b935cab8b165854361"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "pg_partman SQL injection in undo partition time encoder"
}