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CVE-2026-63128

🗓️ 16 Sep 2026 14:49:04Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 44 Views🌐 WEB

Unauthenticated permanent session-table leak in RMCP prior to 2.0.0 causes remote DoS.

Related
Affected
Refs
Paths
[
  {
    "vendor": "modelcontextprotocol",
    "product": "rust-sdk",
    "versions": [
      {
        "version": "< 2.0.0",
        "status": "affected"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
JSON-RPC POSTrequest body/An unauthenticated client can send a JSON-RPC POST request that is not an initialization request (or an initialization request with a mismatched protocol header), causing the server to create a session in LocalSessionManager without proper validation, leading to memory exhaustion and DoS.CWE-400, CWE-401, CWE-772

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30 Sep 2026 17:51Current
6Medium risk
Vulners AI Score6
CVSS 3.17.5
EPSS0.00535
SSVC
44