CVE-2026-52870
CVE-2026-52870 · MCP Python SDK: Experimental task handlers allow any client to access and cancel other clients' tasks
Cette page présente des faits issus de sources publiques. Consultez l’avis original avant toute mise à jour.
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.
CVSS 7.6 · Élevée · EPSS 0,4% · Correctif disponible
- Publication
- Mise à jour
Pile logicielle: python
Produits et versions concernés
python-sdk
- Versions du logiciel
- >= 1.23.0, < 1.27.2: Concernée
Aucun correctif publié
mcp PyPI
- Versions du logiciel
- 1.23.0
- 1.23.1
- 1.23.2
- 1.23.3
- 1.24.0
- 1.25.0
- 1.26.0
- 1.27.0
- 1.27.1
- Plages de versions concernées
- ECOSYSTEM: ≥ 1.23.0, < 1.27.2
Mettez à jour vers 1.27.2
Sources originales
- https://github.com/modelcontextprotocol/python-sdk/security/advisories/GHSA-hvrp-rf83-w775
- https://github.com/modelcontextprotocol/python-sdk/pull/2720
- https://github.com/modelcontextprotocol/python-sdk/commit/62137874ff26dd74d2fea80ff528a7fd9ca7a5e7
- https://github.com/modelcontextprotocol/python-sdk/releases/tag/v1.27.2
- https://nvd.nist.gov/vuln/detail/CVE-2026-52870