FKIE_CVE-2026-42073

Vulnerability from fkie_nvd - Published: 2026-06-02 17:16 - Updated: 2026-06-03 16:54
Severity
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Summary
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.
References
security-advisories@github.comhttps://github.com/Gitlawb/openclaude/commit/739b8d1f40fde0e401a5cbd2b9a55d88bd5124adPatch
security-advisories@github.comhttps://github.com/Gitlawb/openclaude/releases/tag/v0.5.1Release Notes
security-advisories@github.comhttps://github.com/Gitlawb/openclaude/security/advisories/GHSA-c73c-x77g-854rExploit, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/Gitlawb/openclaude/security/advisories/GHSA-c73c-x77g-854rExploit, Vendor Advisory
Impacted products
Vendor Product Version
gitlawb openclaude *
To clipboard 

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              "versionEndExcluding": "0.5.1",
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  "descriptions": [
    {
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      "value": "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 \u2014 without knowing the state value at all. This issue has been patched in version 0.5.1."
    }
  ],
  "id": "CVE-2026-42073",
  "lastModified": "2026-06-03T16:54:29.273",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
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  "published": "2026-06-02T17:16:31.910",
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          "value": "CWE-400"
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      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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