CVE-2026-126199 (GCVE-0-2026-126199)

Vulnerability from cvelistv5 – Published: 2026-11-12 17:32 – Updated: 2026-11-12 17:32
VLAI
Title
pgEdge Postgres MCP Server write confirmation skipped for writes that begin with a reading keyword
Summary
pgEdge Postgres MCP Server enables SQL queries against PostgreSQL databases through Model Context Protocol compatible clients. Prior to 1.1.0, the bundled CLI and web clients classified query_database statements only by their first keyword before deciding whether to display a write confirmation. SELECT INTO, data-modifying common table expressions beginning with WITH, and EXPLAIN ANALYZE of a write were treated as reads and could execute without confirmation on an allow_writes connection. Read-only connections remain protected by PostgreSQL transaction access mode, and EXPLAIN without ANALYZE and SELECT FOR UPDATE remain classified as reads. This issue is fixed in 1.1.0.
Severity
6.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H
CWE
  • CWE-357 - Insufficient UI Warning of Dangerous Operations
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7843 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
pgEdge pgedge-postgres-mcp Affected: < 1.1.0
guessed Create a notification for this product.
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{
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          "vendor": "pgEdge",
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          "value": "pgEdge Postgres MCP Server enables SQL queries against PostgreSQL databases through Model Context Protocol compatible clients. Prior to 1.1.0, the bundled CLI and web clients classified query_database statements only by their first keyword before deciding whether to display a write confirmation. SELECT INTO, data-modifying common table expressions beginning with WITH, and EXPLAIN ANALYZE of a write were treated as reads and could execute without confirmation on an allow_writes connection. Read-only connections remain protected by PostgreSQL transaction access mode, and EXPLAIN without ANALYZE and SELECT FOR UPDATE remain classified as reads. This issue is fixed in 1.1.0."
        }
      ],
      "metrics": [
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            "baseScore": 6.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
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      "providerMetadata": {
        "dateUpdated": "2026-11-12T17:32:08.972Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
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          "name": "https://github.com/pgEdge/pgedge-postgres-mcp/security/advisories/GHSA-5gmh-9683-hhq9",
          "tags": [
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          ],
          "url": "https://github.com/pgEdge/pgedge-postgres-mcp/security/advisories/GHSA-5gmh-9683-hhq9"
        },
        {
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          "tags": [
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          "url": "https://github.com/pgEdge/pgedge-postgres-mcp/pull/233"
        },
        {
          "name": "https://github.com/pgEdge/pgedge-postgres-mcp/commit/310c02809891cfaee6e4891cd7bb9aa1d459575c",
          "tags": [
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        },
        {
          "name": "https://github.com/pgEdge/pgedge-postgres-mcp/releases/tag/v1.1.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pgEdge/pgedge-postgres-mcp/releases/tag/v1.1.0"
        }
      ],
      "source": {
        "advisory": "GHSA-5gmh-9683-hhq9",
        "discovery": "UNKNOWN"
      },
      "title": "pgEdge Postgres MCP Server write confirmation skipped for writes that begin with a reading keyword"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-126199",
    "datePublished": "2026-11-12T17:32:08.972Z",
    "dateReserved": "2026-11-10T20:07:44.958Z",
    "dateUpdated": "2026-11-12T17:32:08.972Z",
    "state": "PUBLISHED"
  },
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  "vulnerability-lookup:meta": {
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    },
    "nvd": {
      "cve": {
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              {
                "product": "pgedge-postgres-mcp",
                "vendor": "pgEdge",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c 1.1.0"
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        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "pgEdge Postgres MCP Server enables SQL queries against PostgreSQL databases through Model Context Protocol compatible clients. Prior to 1.1.0, the bundled CLI and web clients classified query_database statements only by their first keyword before deciding whether to display a write confirmation. SELECT INTO, data-modifying common table expressions beginning with WITH, and EXPLAIN ANALYZE of a write were treated as reads and could execute without confirmation on an allow_writes connection. Read-only connections remain protected by PostgreSQL transaction access mode, and EXPLAIN without ANALYZE and SELECT FOR UPDATE remain classified as reads. This issue is fixed in 1.1.0."
          }
        ],
        "id": "CVE-2026-126199",
        "lastModified": "2026-11-12T19:09:06.967",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
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                "attackVector": "NETWORK",
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              "type": "Secondary"
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        },
        "published": "2026-11-12T18:17:25.123",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/pgEdge/pgedge-postgres-mcp/commit/310c02809891cfaee6e4891cd7bb9aa1d459575c"
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          }
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        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
          {
            "description": [
              {
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                "value": "CWE-357"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



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