CVE-2026-58201: CWE-918: Server-Side Request Forgery (SSRF) in merill lokka
CVE-2026-58201 is a Server-Side Request Forgery (SSRF) vulnerability in the Lokka-Microsoft tool of the merill lokka project prior to version 2.1.2. The vulnerability arises from unsafe URL concatenation that allows an attacker to manipulate URL parsing and cause an Azure Resource Manager bearer token to be sent to an unintended host. This issue has been fixed in version 2.1.2.
AI Analysis
Technical Summary
Lokka is a Model Context Protocol server for Microsoft 365 services. In versions before 2.1.2, the Lokka-Microsoft tool concatenates a user-controlled path directly to the management.azure.com base URL without proper validation. This allows an attacker to craft a path that alters URL authority parsing, resulting in the leakage of an Azure Resource Manager bearer token to an unintended external host. The vulnerability is classified as CWE-918 (Server-Side Request Forgery). The issue is resolved in version 2.1.2.
Potential Impact
An attacker can exploit this SSRF vulnerability to cause the server to send sensitive Azure Resource Manager bearer tokens to an attacker-controlled host. This token leakage could potentially allow unauthorized access to Azure resources if the token is intercepted and reused. The CVSS 4.0 score is 8.7 (high severity), indicating a significant security risk without requiring authentication or user interaction.
Mitigation Recommendations
A fix is available in version 2.1.2 of merill lokka. Users should upgrade to version 2.1.2 or later to remediate this vulnerability. Since this is a cloud service, the vendor manages remediation for the cloud-hosted service. Check the vendor advisory for confirmation and further guidance.
CVE-2026-58201: CWE-918: Server-Side Request Forgery (SSRF) in merill lokka
Description
CVE-2026-58201 is a Server-Side Request Forgery (SSRF) vulnerability in the Lokka-Microsoft tool of the merill lokka project prior to version 2.1.2. The vulnerability arises from unsafe URL concatenation that allows an attacker to manipulate URL parsing and cause an Azure Resource Manager bearer token to be sent to an unintended host. This issue has been fixed in version 2.1.2.
CVSS v4.0
Score 8.7high
Affected software
merill
lokka
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Lokka is a Model Context Protocol server for Microsoft 365 services. In versions before 2.1.2, the Lokka-Microsoft tool concatenates a user-controlled path directly to the management.azure.com base URL without proper validation. This allows an attacker to craft a path that alters URL authority parsing, resulting in the leakage of an Azure Resource Manager bearer token to an unintended external host. The vulnerability is classified as CWE-918 (Server-Side Request Forgery). The issue is resolved in version 2.1.2.
Potential Impact
An attacker can exploit this SSRF vulnerability to cause the server to send sensitive Azure Resource Manager bearer tokens to an attacker-controlled host. This token leakage could potentially allow unauthorized access to Azure resources if the token is intercepted and reused. The CVSS 4.0 score is 8.7 (high severity), indicating a significant security risk without requiring authentication or user interaction.
Mitigation Recommendations
A fix is available in version 2.1.2 of merill lokka. Users should upgrade to version 2.1.2 or later to remediate this vulnerability. Since this is a cloud service, the vendor manages remediation for the cloud-hosted service. Check the vendor advisory for confirmation and further guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-29T17:09:25.872Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Is Cloud Service
- true
Threat ID: 6aa97a1355bf5e2cf51ed0a8
Added to database: 09/15/2026, 17:02:11 UTC
Last enriched: 09/15/2026, 17:16:32 UTC
Last updated: 09/15/2026, 17:40:18 UTC
Views: 6
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