dbt: Unauthenticated Arbitrary SQL Execution in `dbt docs serve`

{
  "id": "167e77e56511ca02fd2a7756985d2124c1df9189714938cf4e89eaa5b9384af5",
  "url": "https://osv.dev/vulnerability/CVE-2026-100406",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "dbt: Unauthenticated Arbitrary SQL Execution in `dbt docs serve`",
    "summary": "dbt enables data analysts and engineers to transform their data using the same practices that software engineers use to build applications. From 2.0.0-alpha.0 until 2.0.0-alpha.5, dbt docs serve exposes the unauthenticated POST /api/v1/query endpoint in crates/dbt-docs-server/src/handlers/query.rs, which passes caller-supplied SQL to DuckDbViewsBackend::query_arrow() in crates/dbt-index-core/src/backend.rs without authorization or an allowlist. A client that can reach the server can invoke DuckDB filesystem-reading functions to read files available to the dbt process, including files outside the docs index directory. The server binds to localhost by default, but operators can expose it to a network through the host option or DBT_DOCS_HOST setting. This issue is fixed in version 2.0.0-alpha.5.",
    "evidence": "osv:CVE-2026-100406",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-100406",
      "aliases": [
        "CVE-2026-100406",
        "GHSA-h2j2-2r7g-rff8"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
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            {
              "repo": "https://github.com/dbt-labs/dbt",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "a994adfd08995108d79e21a3b1d19e09c9a12463"
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                {
                  "fixed": "3a5d26fe02b58382720d04cbd87143b7b6775413"
                }
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              "database_specific": {
                "extracted_events": [
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                    "range": [
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                        "introduced": "2.0.0-alpha.0"
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                        "fixed": "2.0.0-alpha.5"
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                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "3a5d26fe02b58382720d04cbd87143b7b6775413"
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                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "a994adfd08995108d79e21a3b1d19e09c9a12463"
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                    "source": "REFERENCES_TAG",
                    "original_tag": "v2.0.0-alpha.5"
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          "versions": [
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          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100406.json"
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      ],
      "modified": "2026-10-28T02:30:49.508649703Z",
      "provider": "osv",
      "references": [
        "https://github.com/dbt-labs/dbt/releases/tag/v2.0.0-alpha.5",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100406.json",
        "https://github.com/dbt-labs/dbt/security/advisories/GHSA-h2j2-2r7g-rff8",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-100406",
        "https://github.com/dbt-labs/dbt/commit/3a5d26fe02b58382720d04cbd87143b7b6775413"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-200",
          "CWE-22",
          "CWE-306"
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        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100406.json"
      }
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    "related_cves": [
      {
        "value": "CVE-2026-100406",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 518062,
  "published_at": "2026-10-14T18:27:24.863+00:00"
}