LSTM-Kirigaya's openmcp-client Vulnerable to RCE in MCP Authorization Flow
Priority HIGH 73CWE-78Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Active
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-78.
Summary
LSTM-Kirigaya's openmcp-client is a vscode plugin for mcp developer. Prior to version 0.1.12, when users on a Windows platform connect to an attacker controlled MCP server, attackers could provision a malicious authorization server endpoint to silently achieve an OS command injection attack in the open() invocation, leading to client system compromise. This issue has been patched in version 0.1.12.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01217 68th percentileScored 2026-11-07
Fix Fixed openmcp-client (LSTM-Kirigaya): 0.1.12
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| LSTM-Kirigaya | openmcp-client | before 0.1.12 | 0.1.12 | Patch available | CNA |
- openmcp-client VendorLSTM-Kirigaya Affected before 0.1.12 Fixed in 0.1.12 Patch available CNA
Remediation
- Fix · CNA openmcp-client (LSTM-Kirigaya) Fixed in 0.1.12
Timeline
- 2026-10-02 Threatist record created from CVE-2025-58062
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences