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CVE-2026-52870

🗓️ 15 Jul 2026 20:07:53Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov📰️ 1 Media mentions👁 150 Views

CVE-2026-52870: MCP Python SDK experimental task handlers allowed cross-client task access and cancellation; fixed in 1.27.2.

Related
Detection
Affected
Refs
Social
NVD
Node
lfprojectsmcp_python_sdkRange1.23.0–1.27.2
[
  {
    "vendor": "modelcontextprotocol",
    "product": "python-sdk",
    "versions": [
      {
        "version": ">= 1.23.0, < 1.27.2",
        "status": "affected"
      }
    ]
  }
]

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24 Oct 2026 21:10Current
6Medium risk
Vulners AI Score6
CVSS 3.17.6
EPSS0.00388
SSVC
150