EUVD-2026-33738
GHSA-6w53-8mcc-fqqh
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionCVE.org
A security flaw has been discovered in horizon921 mcpilot 0.1.0. The impacted element is an unknown function of the file client/src/app/api/mcp/call/route.ts of the component MCP API Call Endpoint. The manipulation of the argument serverBaseUrl results in server-side request forgery. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
AnalysisAI
Server-side request forgery in horizon921 mcpilot 0.1.0 allows unauthenticated remote attackers to force the server to issue arbitrary HTTP requests by supplying a malicious value to the serverBaseUrl parameter in the MCP API Call Endpoint (client/src/app/api/mcp/call/route.ts). The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N) confirms the attack requires no authentication and no user interaction, making it trivially reachable from the network. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No special conditions are required for exploitation. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 5.5 reflects partial impact across confidentiality, integrity, and availability (VC:L/VI:L/VA:L) with no scope change to secondary systems (SC:N/SI:N/SA:N). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An unauthenticated attacker sends a crafted HTTP POST request to the publicly accessible `/api/mcp/call` endpoint, supplying `serverBaseUrl` set to an internal target such as `http://169.254.169.254/latest/meta-data/iam/security-credentials/` (AWS IMDSv1). The mcpilot server issues the forged request on the attacker's behalf and returns the response, potentially exposing cloud IAM credentials or internal service data. … |
| Remediation | No vendor-released patch has been identified at time of analysis; the vendor has not responded to the disclosure filed via GitHub issue (https://github.com/horizon921/mcpilot/issues/1). … Detailed patch versions, workarounds, and compensating controls in full report. |
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