MCP Python SDK: Experimental task handlers allow any client to access and cancel other clients' tasks
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| modelcontextprotocol | python-sdk | affected |
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No data.
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| Modelcontextprotocol | Python-sdk |
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Github GHSA |
GHSA-hvrp-rf83-w775 | MCP Python SDK: Experimental task handlers allow any client to access and cancel other clients' tasks |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.388% probability within 30 days)
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ssvc
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| First Time appeared |
Modelcontextprotocol
Modelcontextprotocol python-sdk |
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| Vendors & Products |
Modelcontextprotocol
Modelcontextprotocol python-sdk |
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| Description | The MCP Python SDK, called mcp on PyPI, is a Python implementation of the Model Context Protocol (MCP). From 1.23.0 until 1.27.2, default handlers installed by server.experimental.enable_tasks() for tasks/list, tasks/get, tasks/result, and tasks/cancel operate only on task identifiers without recording the session that created each task, allowing any connected client to enumerate, read results from, consume messages for, or cancel other clients' tasks. This issue is fixed in version 1.27.2. | |
| Title | MCP Python SDK: Experimental task handlers allow any client to access and cancel other clients' tasks | |
| Weaknesses | CWE-862 | |
| References |
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| Metrics |
cvssV3_1
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