Security Advisory

CVE-2026-42073

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-06-02 15:38:53

Last updated 2026-06-02 17:40:55

Assigner GitHub_M

CVSS score not scored

State PUBLISHED

Description

OpenClaude is an open-source coding-agent command line interface for cloud and local model providers. Prior to version 0.5.1, the OpenClaude MCP authentication flow starts a temporary local HTTP server to handle OAuth callbacks. To prevent CSRF attacks, the server validates a state parameter against an internally stored value. However, due to a logic flaw in the order of conditionals, an attacker can completely bypass this check and force the server to shut down — without knowing the state value at all. This issue has been patched in version 0.5.1.

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