{"cve":"CVE-2026-55837","nvd":{"published":"2026-09-14T17:17:48.547","modified":"2026-09-30T17:51:56.193","status":"Deferred","description":"dbt-mcp is a Model Context Protocol server for interacting with dbt. Prior to 1.20.0, the local OAuth helper in src/dbt_mcp/oauth/fastapi_app.py exposes GET /dbt_platform_context without authentication or Host validation after a user completes the dbt Platform OAuth flow. The endpoint returns the full DbtPlatformContext, including access_token and refresh_token values persisted by the context manager, to any process that can reach 127.0.0.1:6785. The absence of TrustedHostMiddleware allows a remote attacker to use DNS rebinding against a victim's browser because the helper accepts arbitrary Host headers, while a co-located process can request the endpoint directly. The stolen tokens provide immediate dbt Platform API access as the victim and persistent access through the refresh token, allowing access to or modification of projects, jobs, environment secrets, and related account data. This issue is fixed in version 1.20.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N","score":6.8},"cwes":["CWE-200","CWE-306","CWE-346"],"references":["https://github.com/dbt-labs/dbt-mcp/commit/b8bdb40f90ed29f6b36176c5f6c697aa27a035a9","https://github.com/dbt-labs/dbt-mcp/pull/789","https://github.com/dbt-labs/dbt-mcp/releases/tag/v1.20.0","https://github.com/dbt-labs/dbt-mcp/security/advisories/GHSA-jr33-mw75-7j8f","https://github.com/dbt-labs/dbt-mcp/security/advisories/GHSA-jr33-mw75-7j8f"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:53:43.293028046+00:00"},"epss":{"cve":"CVE-2026-55837","score":0.00273,"percentile":0.19462,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-jr33-mw75-7j8f","url":"https://osv.dev/vulnerability/GHSA-jr33-mw75-7j8f","summary":"dbt MCP Server: Unauthenticated OAuth Context Endpoint Leaks dbt Platform Tokens","modified":"2026-07-13T16:42:45.012915552Z","packages":[{"ecosystem":"PyPI","name":"dbt-mcp","purl":"pkg:pypi/dbt-mcp","ranges":["<1.20.0"],"fixed":["1.20.0"]}]},{"id":"PYSEC-2026-2443","url":"https://osv.dev/vulnerability/PYSEC-2026-2443","summary":"dbt MCP Server: Unauthenticated OAuth Context Endpoint Leaks dbt Platform Tokens","modified":"2026-07-13T16:31:43.482924749Z","packages":[{"ecosystem":"PyPI","name":"dbt-mcp","purl":"pkg:pypi/dbt-mcp","ranges":["<1.20.0"],"fixed":["1.20.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}