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Medium

Tabularis through 0.27.0 Read-Only Bypass via MCP run_query SELECT Classification

Type: advisorySources: OSV

Tabularis through 0.27.0 contains an incorrect authorization vulnerability in the MCP run_query safety gate that allows prompt-injected agents or untrusted MCP clients to bypass read-only mode by submitting side-effecting SELECT statements. Attackers can run statements like SELECT setval, nextval, or PostgreSQL query_to_xml with embedded DELETE to modify data without approval prompts.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2026-108604
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 05:06 UTC · Revision 1

Source evidence

Tabularis through 0.27.0 Read-Only Bypass via MCP run_query SELECT Classification

core-osv · Original source

Published 10 Oct 2026, 19:54 UTC

Tabularis through 0.27.0 contains an incorrect authorization vulnerability in the MCP run_query safety gate that allows prompt-injected agents or untrusted MCP clients to bypass read-only mode by submitting side-effecting SELECT statements. Attackers can run statements like SELECT setval, nextval, or PostgreSQL query_to_xml with embedded DELETE to modify data without approval prompts.

osv:CVE-2026-108604
Complete source record
{
  "id": "769f023389f5cd41e7c8bf5dbd6318a3c115322b66c50ba302ef705aee67f306",
  "url": "https://osv.dev/vulnerability/CVE-2026-108604",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Tabularis through 0.27.0 Read-Only Bypass via MCP run_query SELECT Classification",
    "summary": "Tabularis through 0.27.0 contains an incorrect authorization vulnerability in the MCP run_query safety gate that allows prompt-injected agents or untrusted MCP clients to bypass read-only mode by submitting side-effecting SELECT statements. Attackers can run statements like SELECT setval, nextval, or PostgreSQL query_to_xml with embedded DELETE to modify data without approval prompts.",
    "evidence": "osv:CVE-2026-108604",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-108604",
      "aliases": [
        "CVE-2026-108604"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/tabularisdb/tabularis",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "804c4c3bb6fd8eaa2e36cbe49f6c0d58f373b5e9"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.27.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.27.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.27.0",
            "nightly-20261008-5a616f9",
            "nightly-20261006-c0fe758",
            "nightly-20261002-b78a409",
            "nightly-20261001-ec45851",
            "nightly-20260930-ff4c5e4",
            "nightly-20260929-8d94624",
            "nightly-20260929-b5f81cc",
            "nightly-20260928-44a112e",
            "nightly-20260924-32b8ee5",
            "nightly-20260923-ef21476",
            "nightly-20260922-65baceb",
            "nightly-20260922-72895f9",
            "nightly-20260921-e5ce805",
            "nightly-20260921-d044381",
            "nightly-20260919-d044381",
            "nightly-20260918-992d969",
            "v0.24.0",
            "nightly-20260917-0ba519d",
            "nightly-20260916-c2f0a0a",
            "nightly-20260915-59da635",
            "v0.23.0",
            "nightly-20260911-1583a64",
            "nightly-20260912-1bae5d7",
            "nightly-20260910-809b135",
            "nightly-20260904-d470693",
            "nightly-20260903-bbbb798",
            "v0.22.0",
            "nightly-20260902-2881415",
            "nightly-20260901-6c01c99",
            "nightly-20260831-38187c2",
            "nightly-20260828-9e6975a",
            "v0.21.0",
            "nightly-20260826-dd544ca",
            "nightly-20260825-cb276c8",
            "nightly-20260823-45745fc",
            "nightly-20260822-1ffafa2",
            "nightly-20260820-9ee8406",
            "nightly-20260819-4f415ad",
            "v0.20.0",
            "nightly-20260816-5b1abe3",
            "nightly-20260815-b39f1ce",
            "nightly-20260814-dc778ed",
            "nightly-20260813-356ce3f",
            "nightly-20260812-e800618",
            "v0.19.0",
            "nightly-20260811-f143f73",
            "nightly-20260808-59742aa",
            "nightly-20260806-6fe4230",
            "nightly-20260805-cc4c08a",
            "nightly-20260804-54d9eae",
            "v0.18.0",
            "nightly-20260803-fcee3d5",
            "nightly-20260802-38afd0f",
            "nightly-20260801-5110f3e",
            "nightly-20260731-a7a221c",
            "nightly-20260730-c41a3b8",
            "nightly-20260729-946f3db",
            "nightly-20260728-81ffa0e",
            "v0.17.0",
            "nightly-20260727-1327328",
            "nightly-20260726-1ad3b8d",
            "nightly-20260725-6288eea",
            "nightly-20260724-a94f626",
            "nightly-20260723-c43c37b",
            "nightly-20260722-1fb13f1",
            "v0.16.0",
            "nightly-20260721-4b6fae0",
            "nightly-20260718-e8e729c",
            "nightly-20260717-bdc676a",
            "v0.15.0",
            "v0.14.0",
            "v0.13.4",
            "v0.13.3",
            "v0.13.2",
            "v0.13.1",
            "v0.13.0",
            "v0.12.0",
            "v0.11.0",
            "v0.10.3",
            "v0.10.2",
            "v0.10.1",
            "v0.9.21",
            "v0.9.20",
            "v0.9.19",
            "v0.9.18",
            "v0.9.17",
            "v0.9.15",
            "v0.9.14",
            "v0.9.13",
            "v0.9.12",
            "v0.9.11",
            "v0.9.10",
            "v0.9.9",
            "v0.9.8",
            "v0.9.7",
            "v0.9.6",
            "v0.9.5",
            "v0.9.2",
            "v0.9.1",
            "v0.9.0",
            "v0.8.15",
            "v0.8.14",
            "v0.8.13",
            "v0.8.12",
            "v0.8.11",
            "v0.8.10",
            "v0.8.9",
            "v0.8.8",
            "v0.8.7",
            "v0.8.6",
            "v0.8.5",
            "v0.8.4",
            "v0.8.2",
            "v0.8.1",
            "v0.7.1",
            "v0.7.0",
            "v0.6.1",
            "v0.6.0",
            "v0.5.0",
            "v0.4.0",
            "v0.3.0",
            "v0.2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-108604.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:26.080533432Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/108xxx/CVE-2026-108604.json",
        "https://hackmd.io/@haind/S1BofaIsMx",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-108604",
        "https://www.vulncheck.com/advisories/tabularis-through-0.27.0-read-only-bypass-via-mcp-run-query-select-classification",
        "https://github.com/TabularisDB/tabularis",
        "https://github.com/TabularisDB/tabularis/blob/804c4c3bb6fd8eaa2e36cbe49f6c0d58f373b5e9/src-tauri/src/ai_activity.rs#L357-L416",
        "https://github.com/TabularisDB/tabularis/blob/804c4c3bb6fd8eaa2e36cbe49f6c0d58f373b5e9/src-tauri/src/mcp/mod.rs#L1136-L1171"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-863"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/108xxx/CVE-2026-108604.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-108604",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 492651,
  "published_at": "2026-10-10T19:54:37.564+00:00"
}