CVE-2026-116684
CVE-2026-116684 · Model Context Protocol Python SDK: Server bearer-token authentication accepts tokens issued for a different resource server
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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 · Mittel · EPSS 0,4% · Korrektur verfügbar
- Veröffentlicht
- Aktualisiert
Technologie-Stack: python
Betroffene Produkte und Versionen
python-sdk
- Softwareversionen
- >= 1.10.0, < 1.30.0: Betroffen
- >= 2.0.0, < 2.2.0: Betroffen
Keine Korrektur veröffentlicht
mcp PyPI
- Softwareversionen
- 2.0.0
- 2.0.1
- 2.1.0
- 2.1.1
- Betroffene Versionsbereiche
- ECOSYSTEM: ≥ 2.0.0, < 2.2.0
Auf 2.2.0 aktualisieren
mcp PyPI
- Softwareversionen
- 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
- Betroffene Versionsbereiche
- ECOSYSTEM: ≥ 1.10.0, < 1.30.0
Auf 1.30.0 aktualisieren
Originalquellen
- 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