Vulnerability details
CVE-2026-58201
merill lokka
Lokka: Azure Resource Manager URL path validation issue
CVSS 4.0
8.7High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.7High | 4.0 | CVEProject cvelistV5 (CNA) (GitHub_M) | 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 |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| merill | lokka | < 2.1.2 | CVEProject cvelistV5 (CNA) |
References and advisories
3- https://github.com/merill/lokka/security/advisories/GHSA-g2gw-q38m-vjfc x_refsource_CONFIRM
- https://github.com/merill/lokka/pull/47 x_refsource_MISC
- https://github.com/merill/lokka/commit/babead878f44cc2face2f8ee55d8b706e420947e x_refsource_MISC
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Details
- Published
- 2026-09-15
- Last updated
- 2026-09-15
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.48%
Probability of exploitation in 30 days
41.6%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-918Server-Side Request Forgery (SSRF)