CVE-2026-58201CWE-918ssrf

CVE-2026-58201

published September 15, 2026

CVSS
8.7
EPSS
0%
Percentile
40.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
8.7 · NONE
CVSS v4.0
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
EPSS
0.00480 · 40.4th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-09-15T21:17Z
References (3)
https://github.com/merill/lokka/commit/babead878f44cc2face2f8ee55d8b706e420947e · [email protected]https://github.com/merill/lokka/pull/47 · [email protected]https://github.com/merill/lokka/security/advisories/GHSA-g2gw-q38m-vjfc · [email protected]
EPSS history
Timeline
  • 17 SEP 03:31Z
    EPSS moved — → 0%
    epss
  • 15 SEP 16:48Z
    Lokka: Azure Resource Manager URL path validation issue
    cvelistv5