CVE-2026-81846
Received Received - Intake

Authorization Bypass in runZero Platform MCP

Publication date: 2026-09-01

Last updated on: 2026-09-01

Assigner: runZero

Description
An authorization bypass in the runZero Platform MCP service has been resolved in version 5.1.260826.0. This issue is an instance of CWE-639: Authorization Bypass Through User-Controlled Key and has an estimated CVSS score of CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N (3.5 Low).

CVSS Scores

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Meta Information

Published
2026-09-01
Last Modified
2026-09-01
Generated
2026-09-02
AI Q&A
2026-09-01
EPSS Evaluated
N/A
NVD
CVE-2026-81846
EUVD
EUVD-2026-69554

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
runzero platform 5.1.260826.0
runzero platform_mcp 5.1.260826.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-639 The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

Attack-Flow Graph

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Executive Summary

This is an authorization bypass vulnerability in the runZero Platform MCP service. It allows unauthorized access by manipulating user-controlled keys, classified under CWE-639. The issue was fixed in version 5.1.260826.0.

Detection Guidance

To detect this vulnerability, check if your runZero Platform MCP service is running version 5.1.260826.0 or later. Verify the service version using the runZero admin interface or command-line tools provided by runZero. If an older version is detected, update immediately to the patched version.

Impact Analysis

An attacker with low privileges could bypass authorization controls to access sensitive data or perform unauthorized actions. The impact is limited due to the low CVSS score, but data confidentiality could be compromised.

Compliance Impact

This vulnerability could lead to unauthorized data access, potentially violating GDPR (data protection) or HIPAA (health data privacy) if exploited. Organizations must ensure proper access controls to maintain compliance.

Mitigation Strategies

Update the runZero Platform MCP service to version 5.1.260826.0 or later to address the authorization bypass vulnerability.

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