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Advisory record · GHSA-jr33-mw75-7j8f

dbt MCP Server: Unauthenticated OAuth Context Endpoint Leaks dbt Platform Tokens

CVSS 6.8 MediumEPSS 0.0027 · 19th percentile

Published by the GitHub Advisory Database at 19 Jun 2026, 21:15 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
dbt-mcpPyPI<1.20.01.20.0
Identifiers
GHSA-jr33-mw75-7j8f · CVE-2026-55837 · PYSEC-2026-2443
Weakness (CWE)
CWE-200 · CWE-306 · CWE-346
Tags
Published
19 Jun 2026
Updated
13 Jul 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The dbt-mcp PyPI package is vulnerable in versions before 1.20.0 (fixed in 1.20.0). Its local OAuth helper server exposes an endpoint without authentication or host-origin checks, returning the user's dbt Platform access and refresh tokens. An attacker on the same host, or a remote site using DNS rebinding against the victim's browser, could retrieve these tokens and use them for dbt Cloud API access. Upgrade to dbt-mcp 1.20.0 or later.

Written 6 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.8 Medium 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0027, the 19th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:02 UTC First seen by agentprime
  2. 31 Oct 2026, 15:02 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.