CVE-2026-116684
CVE-2026-116684 · Model Context Protocol Python SDK: Server bearer-token authentication accepts tokens issued for a different resource server
Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.
The Model Context Protocol Python SDK is the official Python SDK for Model Context Protocol servers and clients. From 1.10.0 until 1.30.0 and 2.2.0, server-side bearer authentication configured through AuthSettings with token_verifier accepts a valid token issued for another service when the authorization server serves multiple resources and the TokenVerifier does not independently validate the aud audience. This resource-confusion flaw lets a token holder authenticate to the wrong MCP server and exercise that token's resulting access. This issue is fixed in versions 1.30.0 and 2.2.0.
CVSS 6.8 · Media · EPSS 0,4% · Corrección disponible
- Publicación
- Actualización
Pila tecnológica: python
Productos y versiones afectados
python-sdk
- Versiones
- >= 1.10.0, < 1.30.0: Afectada
- >= 2.0.0, < 2.2.0: Afectada
Sin corrección publicada
mcp PyPI
- Versiones
- 2.0.0
- 2.0.1
- 2.1.0
- 2.1.1
- Intervalos de versiones afectados
- ECOSYSTEM: ≥ 2.0.0, < 2.2.0
Actualiza a 2.2.0
mcp PyPI
- Versiones
- 1.10.0
- 1.10.1
- 1.11.0
- 1.12.0
- 1.12.1
- 1.12.2
- 1.12.3
- 1.12.4
- 1.13.0
- 1.13.1
- 1.14.0
- 1.14.1
- 1.15.0
- 1.16.0
- 1.17.0
- 1.18.0
- 1.19.0
- 1.20.0
- 1.21.0
- 1.21.1
- 1.21.2
- 1.22.0
- 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
- 1.27.2
- 1.28.0
- 1.28.1
- 1.29.0
- 1.29.1
- Intervalos de versiones afectados
- ECOSYSTEM: ≥ 1.10.0, < 1.30.0
Actualiza a 1.30.0
Fuentes originales
- https://github.com/modelcontextprotocol/python-sdk/security/advisories/GHSA-w4fh-qvv9-3v23
- https://github.com/modelcontextprotocol/python-sdk/pull/3447
- https://github.com/modelcontextprotocol/python-sdk/pull/3451
- https://github.com/modelcontextprotocol/python-sdk/commit/0c9136841ff092987a20700ff9c2c9789bda2f40
- https://github.com/modelcontextprotocol/python-sdk/commit/8c2fa6eabacde869d75568e33b9d466b58c2f512
- https://github.com/modelcontextprotocol/python-sdk/releases/tag/v1.30.0
- https://github.com/modelcontextprotocol/python-sdk/releases/tag/v2.2.0
- https://nvd.nist.gov/vuln/detail/CVE-2026-116684