stigmem Postgres SQL Injection via Schema Identifier

{
  "id": "1aa78ec25a270ede7d53568a5d94b759e44718fe41c1bdd8c6750f8c6f8d437b",
  "url": "https://osv.dev/vulnerability/CVE-2026-76240",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "stigmem Postgres SQL Injection via Schema Identifier",
    "summary": "stigmem-node 0.9.0a1 interpolates Postgres backend schema identifiers into SQL strings without defensive quoting. In the affected code path the schema value is operator-controlled, but the unsafe pattern could allow SQL injection if a schema name were derived from tenant, request, or user input. Fixed in 0.9.0a2, which adds identifier quoting and validation. As a workaround, only configure schema names from trusted deployment configuration.",
    "evidence": "osv:CVE-2026-76240",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-76240",
      "aliases": [
        "CVE-2026-76240",
        "GHSA-9pc9-4crj-mhpj"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/eidetic-labs/stigmem",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "18ec5dbe3a3970d804f2013b4ae53dd2da8ed4ac"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.9.0a2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.9.0a2"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-76240.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:32.447369893Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76240.json",
        "https://github.com/eidetic-labs/stigmem/security/advisories/GHSA-9pc9-4crj-mhpj",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-76240",
        "https://www.vulncheck.com/advisories/stigmem-postgres-sql-injection-via-schema-identifier"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-89"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/76xxx/CVE-2026-76240.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-76240",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 499568,
  "published_at": "2026-08-19T14:02:18.061+00:00"
}