CVE-2026-55837Public exploitNetwork attack vectorHinoki check available

OAuth token theft via unauthenticated context endpoint

Published Sep 14, 2026 · Updated Sep 14, 2026

Information disclosure in dbt Labs dbt MCP Server before 1.20.0 allows remote attackers to steal dbt Platform OAuth tokens. The GET /dbt_platform_context route in src/dbt_mcp/oauth/fastapi_app.py returns the persisted DbtPlatformContext without authentication or token redaction and accepts arbitrary Host headers. Exploitation requires an active OAuth helper after login and either a co-located process or browser-assisted DNS rebinding, granting access to the victim's dbt Platform projects, jobs, and environment secrets.

CVSS severity6.8
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Information disclosure in dbt Labs dbt MCP Server before 1.20.0 allows remote attackers to steal dbt Platform OAuth tokens. The GET /dbt_platform_context route in src/dbt_mcp/oauth/fastapi_app.py returns the persisted DbtPlatformContext without authentication or token redaction and accepts arbitrary Host headers. Exploitation requires an active OAuth helper after login and either a co-located process or browser-assisted DNS rebinding, granting access to the victim's dbt Platform projects, jobs, and environment secrets.

The record

CVE
CVE-2026-55837
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
dbt Labs
Product
dbt MCP Server
Classifications
CWE-346, CWE-200, CWE-306, T1528
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.20.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

dbt Labs · dbt MCP Serverversion=< 1.20.0

Published CVSS scores

6.8GitHubCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-346Origin Validation Error
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-306Missing Authentication for Critical Function
T1528Steal Application Access Token

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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