CVE-2026-58201
High
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.
SeverityHigh
CVSS8.7
Exploit probability—
Product@merill/lokka
PublishedSep 15, 2026
First seenSep 15, 2026
Weakness typeCWE-918Server-side request forgery (SSRF)
How to fix
Update
- @merill/lokka2.1.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| @merill/lokkanpm | v < 2.1.2 | 2.1.2 |
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