CVE-2026-59950
2 advisories.
PyPI/mcp CVE-2026-59950: high, EPSS 0.23%
MCP Python SDK: WebSocket server transport does not support Host/Origin validation
Action: Upgrade mcp to 1.28.1 or later.
pip install mcp==1.28.1Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 1.28.1 | - |
Fixed versions
| 1.28.1 |
Sources
- osv: GHSA-vj7q-gjh5-988w
- https://github.com/modelcontextprotocol/python-sdk/security/advisories/GHSA-vj7q-gjh5-988w
- https://nvd.nist.gov/vuln/detail/CVE-2026-59950
- https://github.com/modelcontextprotocol/python-sdk/pull/2992
- https://github.com/modelcontextprotocol/python-sdk/commit/777b8d06710c140e3606b0d4598e2aa48546c266
- https://github.com/modelcontextprotocol/python-sdk
- https://github.com/modelcontextprotocol/python-sdk/releases/tag/v1.28.1
CVE-2026-59950 · published · modified · JSON
PyPI/mcp CVE-2026-59950: unknown, EPSS 0.23%
MCP Python SDK: WebSocket server transport does not support Host/Origin validation
Action: Upgrade mcp to 1.28.1 or later.
pip install mcp==1.28.1Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 1.28.1 | - |
Fixed versions
| 1.28.1 |
Sources
- osv: PYSEC-2026-3483
- https://github.com/modelcontextprotocol/python-sdk/security/advisories/GHSA-vj7q-gjh5-988w
- https://nvd.nist.gov/vuln/detail/CVE-2026-59950
- https://github.com/modelcontextprotocol/python-sdk/pull/2992
- https://github.com/modelcontextprotocol/python-sdk/commit/777b8d06710c140e3606b0d4598e2aa48546c266
- https://github.com/modelcontextprotocol/python-sdk
- https://github.com/modelcontextprotocol/python-sdk/releases/tag/v1.28.1
- https://pypi.org/project/mcp
- https://github.com/advisories/GHSA-vj7q-gjh5-988w
CVE-2026-59950 · published · modified · JSON