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CVE-2026-52869 MCP Python SDK: HTTP transports serve session requests without verifying the authenticated principal

🗓️ 15 Jul 2026 20:06:23Reported by GitHub_MType 
vulnrichment
 vulnrichment
🔗 github.com👁 15 Views

CVE-2026-52869: MCP Python SDK before 1.27.2 allowed session hijacking and JSON-RPC injection via session_id or header.

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15 Jul 2026 20:06Current
6.1Medium risk
Vulners AI Score6.1
CVSS 3.17.1
EPSS0.00535
SSVC
15