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CVE-2026-58201

Lokka: Azure Resource Manager URL path validation issue

HIGH
8.7
CVSS Score
Published: September 15, 2026 at 04:48 PM UTC
Updated: September 30, 2026 at 05:51 PM UTC
1 product affected across 1 vendorLokka

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Severity
HIGH8.7
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Lokka· Merill
60%
v < 2.1.2
Affected range stops below 2.1.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (3)

x_refsource_CONFIRM
Source: cverecord
https://github.com/merill/lokka/security/advisories/GHSA-g2gw-q38m-vjfc
x_refsource_MISC
Source: cverecord
https://github.com/merill/lokka/pull/47
x_refsource_MISC
Source: cverecord
https://github.com/merill/lokka/commit/babead878f44cc2face2f8ee55d8b706e420947e

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHGitHub_M
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-918

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