CVE-2026-55837

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Source
https://cve.org/CVERecord?id=CVE-2026-55837
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55837.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55837
Aliases
Published
2026-09-14T16:55:58Z
Modified
2026-09-15T03:48:17Z
Severity
  • 6.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N CVSS Calculator
Summary
dbt-mcp: Unauthenticated OAuth Context Endpoint Leaks dbt Platform Tokens
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-200",
        "CWE-306",
        "CWE-346"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55837.json"
}
References

Affected packages

Git / github.com/dbt-labs/dbt-mcp

Affected ranges

Type
GIT
Repo
https://github.com/dbt-labs/dbt-mcp
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
5f8f5a8ab57017e09794442052736c1d693b37d9
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.20.0"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

v0.*
v0.10.0
v0.10.1
v0.10.2
v0.10.3
v0.2.0
v0.2.1
v0.2.10
v0.2.11
v0.2.12
v0.2.13
v0.2.14
v0.2.15
v0.2.16
v0.2.17
v0.2.18
v0.2.19
v0.2.2
v0.2.20
v0.2.3
v0.2.4
v0.2.5
v0.2.6
v0.2.7
v0.2.8
v0.2.9
v0.3.0
v0.4.0
v0.4.1
v0.4.2
v0.5.0
v0.6.0
v0.6.1
v0.6.2
v0.7.0
v0.8.0
v0.8.1
v0.8.2
v0.8.3
v0.8.4
v0.9.0
v0.9.1
v1.*
v1.0.0
v1.1.0
v1.10.0
v1.11.0
v1.12.0
v1.13.0
v1.14.0
v1.15.0
v1.15.1
v1.16.0
v1.17.0
v1.17.1
v1.18.0
v1.18.1
v1.19.0
v1.19.1
v1.19.2
v1.2.0
v1.3.0
v1.4.0
v1.5.0
v1.5.1
v1.5.2
v1.6.0
v1.6.1
v1.6.2
v1.7.0
v1.8.0
v1.8.1
v1.9.0
v1.9.1
v1.9.2
v1.9.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55837.json"