Vulnerability 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.
Related Weaknesses (CWE)
References
- https://github.com/merill/lokka/commit/babead878f44cc2face2f8ee55d8b706e420947e
- https://github.com/merill/lokka/pull/47
- https://github.com/merill/lokka/security/advisories/GHSA-g2gw-q38m-vjfc
FAQ
What is CVE-2026-58201?
CVE-2026-58201 is a documented vulnerability. 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 concate...
How severe is CVE-2026-58201?
CVSS scoring is not yet available for CVE-2026-58201. Check NVD for updates.
Is there a patch for CVE-2026-58201?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.