# CVE-2026-58201

## Summary

- **CVE ID:** CVE-2026-58201
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-918
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 15, 2026

## Description

Lokka is a Model Context Protocol server for Microsoft 365, including Microsoft Graph and other services. Prior to 2.1.2, the Lokka-Microsoft tool in src/mcp/src/main.ts uses direct URL string concatenation to append the user-controlled path value to the management.azure.com base URL. A specially crafted path can alter URL authority parsing and cause an Azure Resource Manager bearer token to be sent to an unintended host. This issue is fixed in version 2.1.2.

## Affected Products

- merill — lokka (< 2.1.2)

## References

- [CNA](https://github.com/merill/lokka/security/advisories/GHSA-g2gw-q38m-vjfc)
- [CNA](https://github.com/merill/lokka/pull/47)
- [CNA](https://github.com/merill/lokka/commit/babead878f44cc2face2f8ee55d8b706e420947e)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.28%
- **EPSS Percentile:** 20.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._