{"id":"CVE-2026-58201","title":"Lokka is a Model Context Protocol server for Microsoft 365, including Microsoft Graph and other services","summary":"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 …","severity":"high","cvss":8.7,"cvssVector":"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"],"vendor":"merill","product":"lokka","affected":["lokka < 2.1.2"],"published":"2026-09-15","updated":"2026-09-15","sourceUpdated":"2026-09-15T19:17:31.180","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-58201","references":[{"url":"https://github.com/merill/lokka/commit/babead878f44cc2face2f8ee55d8b706e420947e","label":"security-advisories@github.com"},{"url":"https://github.com/merill/lokka/pull/47","label":"security-advisories@github.com"},{"url":"https://github.com/merill/lokka/security/advisories/GHSA-g2gw-q38m-vjfc","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-15T19:01:34.903589Z"},"cvssSource":"cna","ingestedAt":"2026-09-15T17:41:02.864Z","epss":0.00276,"epssPercentile":0.20256,"slug":"CVE-2026-58201","body":"## Overview\n\nLokka 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":47.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}